LABORATORY CHEMISTRY OF NATURAL PRODUCTS

Research interests

Laboratory Natural Product Chemistry has been a part of the Institute of Organic Chemistry since its opening in 1968. The lab was founded by the prominent Bulgarian chemists, Prof. I. Ognyanov, Prof. N. Mollov, Prof. N. Marekov. In 1977, it became a subdivision of the Centre of Phytochemistry, established within a joint project of the Bulgarian Government, UNDP and UNESCO. At present, the Lab is an active participant in the Southeast European Network on Phytochemistry and Chemistry of Natural Products for Green and Sustainable Growth” (SEE PhytoChemNet), created with the support of UNESCO.

Significant part of our research is dedicated to Bulgarian medicinal and aromatic plants (MAP), which are particularly diverse and numerous in our countr, and searching for possibilities to create innovative products based on MAP. Our interests are directed mainly to the families Asteraceae, Lamiaceae, Scrofulariaceae, Fabaceae, Ranunculaceae, Papaveraceae, Solanaceae, Liliaceae, Zygophylaceae, Rosaceae, Apiaceae. Our research is focused on alkaloids, flavonoids and other phenolics, triterpenic saponins, sesquiterpene lactones, essential oils and other biologically active compounds. An important part of our effort is the work on standardization of Bulgarian medicinal plants and extracts thereof. Our aim is to develop modern reliable methods of qualitative and quantitative analysis of the active components for quality control. Also, we are on search for new biologically active compounds from unexplored biological subjects, such as Bulgarian endemic plants, mushrooms, propolis, etc. We are interested mainly in antibacterial, antiviral and antioxidant substances. In both directions we work in close collaboration with biologists and pharmacologists. We also collaborate with colleagues from different countries: Germany, Greece, Macedonia, Mongolia, Serbia, Spain, Turkey, Switzerland etc.

Our major projects at present are on endemic Bulgarian medicinal plant species, search for natural products active against bee pathogens, synthesis of biologically active chalcones.

LABORATORY MEMBERS

Head:

Prof. Dr. Milena Popova


02 9606 149
510
milena.popova@orgchm.bas.bg
Name Room Phone Å-mail*
Prof. Milena Popova, PhD, Head 510 149 milena.popova
Prof. Antoaneta Trendafilova, PhD 518 144 Antoaneta.Trendafilova
Assoc. Prof. Boryana Trusheva, PhD 510 149 Boryana.Trusheva
Assoc. Prof. Kalina Alipieva, PhD 507 137 Kalina.Alipieva
Assoc. Prof. Kalina Danova, PhD 518 141 Kalina.Danova
Assoc. Prof. Tsvetelina Doncheva, PhD 503 194 Tsvetelina.Doncheva
Assist. Prof. Victoria Ivanova, PhD 518 144 Viktoria.Genova
Assist. Prof. Vanya Gerasimova, PhD 507 137 Vanya.Gerasimova
Assist. Prof Nadezhda Kostova, PhD 519 148 Nadezhda.Kostova
Assist. Prof. Ralitsa Istatkova, PhD 503 194 Ralitsa.Istatkova
Assist. Prof. Ralitsa Chimshirova, PhD 510 194 Ralitsa.Chimshirova
Slaveya Krustanova, assistant 507 137 Slaveya.Krustanova
Ivana Hristova, chemist 510 149 Ivana.Hristova
Associated members
Acad. Prof. DSc Vassya Bankova 510 149 Vassya.Bankova

Projects

Financing organization: Bulgarian National Science Fund (BNSF) Competition: Fundamental Research – 2025 Project title: Approaches to modulate bacterial virulence factors using polymeric nanocarriers loaded with plant metabolites (KP-06-H91/13) Period: 2025 – 2028 Coordinator: Prof. Dr. Antoaneta Trendafilova

Financing organization: BAS & Vietnam Academy of Sciences and Technologies Competition: International cooperation program – 2025 Project title: Phytochemical studies of Vietnamese medicinal plants producing isoquinoline alkaloids (IC-VT/02/2026–2027) Period: 2026 – 2027 Coordinator: Assist. Prof. Dr. Tsvetelina Doncheva

Financing organization: BAS & Vietnam Academy of Sciences and Technologies Competition: International cooperation program – 2025 Project title: Chemical composition and biological activity of essential oil plants from northern provinces of Vietnam and proposals for sustainable development Period: 2026 – 2027 Coordinator: Prof. Dr. Antoaneta Trendafilova

Financing organization: BAS & Serbian Academy of Sciences Competition: EBR project – 2025 Project title: Natural products and their semi-synthetic derivatives as cholinesterase inhibitors Period: 2026 – 2028 Coordinator: Prof. Dr. Antoaneta Trendafilova

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Financing organization: Bulgarian National Science Fund (BNSF) Competition: Fundamental Research – 2023 Project title: Comprehensive study of the genus Scrophularia (Scrophulariaceae) in Bulgarian flora – phytochemistry, biosystematics, and anti-obesogenic activity (KP-06-H79/6) Period: 2023 – 2027 Coordinator: Assoc. Prof. Dr. Kalina Alipieva

Financing organization: COST European Cooperation in Science and Technology Competition: June 2019 Project title: An integrated approach to endangered plant conservation in the 21st century Period: 15.10.2019 – 14.10.2023 Coordinator: Dr. Ziva Fiser; Kalina Danova – Management Board Member Project number or acronym: COST Action CA18201 Official page

Financing organization: BAS & Vietnam Academy of Sciences and Technologies Competition: Academic exchange program – 2020 Project title: Phytochemical study and biological activity of plant species of the genus Pandanus from Vietnam Period: 2020 – 2022 Coordinator: Assist. Prof. Dr. Tsvetelina Doncheva

Financing organization: BAS & Serbian Academy of Sciences Competition: Academic exchange program – 2020 Project title: Phytochemical study of secondary metabolites from plants and fungi, as well as their biotransformed products Period: 2020 – 2022 Coordinator: Prof. Dr. Antoaneta Trendafilova

Financing organization: BAS & Vietnam Academy of Sciences and Technologies Competition: Academic exchange program – 2020 Project title: Vietnamese propolis and its plant sources – potential for discovering new biologically active substances Period: 2020 – 2021 Coordinator: Prof. Vassya Bankova, DSc

Financing organization: BAS & Egyptian Academy of Sciences Competition: Academic exchange program – 2019 Project title: Introduction of plant species of the genus Lamiaceae for prostate treatment and biotechnological improvement of biologically active substances Period: 2019 – 2021 Coordinator: Assoc. Prof. Dr. Kalina Danova

Financing organization: Bulgarian National Science Fund (BNSF) Competition: Fundamental Research – 2019 Project title: Modeling accumulation of secondary metabolites by targeting morphogenesis in vitro: obtaining plant components with potential anticancer activity from Mursal tea, White wormwood, and St. John’s Wort species Period: 2019 – 2022 Coordinator: Assoc. Prof. Dr. Kalina Danova

Financing organization: BAS & Czech Academy of Sciences Competition: Interacademic exchange program – 2017 Project title: Development and characterization of in vitro systems for extraction of volatile and non-volatile biologically active substances by regulation of endogenous phytohormonal balance in White wormwood Period: 2017 – 2019 Coordinator: Assoc. Prof. Dr. Kalina Danova

Financing organization: BAS & Serbian Academy of Sciences Competition: Academic exchange program – 2017 Project title: Secondary metabolites in wild and cultivated plants with potential biological activity Period: 2017 – 2019 Coordinator: Prof. Dr. Antoaneta Trendafilova

Financing organization: BAS & Mongolian Academy of Sciences Competition: Academic exchange program – 2017 Project title: Alkaloid profile and biological activity of plant species from Mongolia Period: 2017 – 2019 Coordinator: Assist. Prof. Dr. Tsvetelina Doncheva

Financing organization: Bulgarian National Science Fund (BNSF) Competition: Priority Area Funding – 2017 Project title: Metabolic profile and genetic variability of Thymus species in Bulgaria – scientific basis of phytotherapy and potential for pharmacy Period: 2017 – 2020 Coordinator: Assoc. Prof. Dr. Kalina Alipieva

Financing organization: Bulgarian National Science Fund (BNSF) Competition: Priority Area Funding – 2017 Project title: Green approaches for utilization of green wealth – natural deep eutectic solvents for extraction of biologically active substances from natural objects Period: 2017 – 2019 Coordinator: Prof. Vassya Bankova, DSc

Financing organization: Bulgarian National Science Fund (BNSF) Competition: Fundamental Research – 2016 Project title: Phytochemical and biological study of species of the genus Inula (Asteraceae) from the Bulgarian flora – new sources of biologically active substances Period: 2016 – 2019 Coordinator: Prof. Dr. Antoaneta Trendafilova

Financing organization: Bulgarian National Science Fund (BNSF) Competition: Priority Area Funding – 2014 Project title: A rational platform for the sustainable production of pharmaceutically relevant molecules from plants and their in vitro cultures Period: 2014 – 2017 Coordinator: Prof. Dr. Milena Popova

Publications

2025

Molecules, 30(8), 1702
Phytochemical characterization and anti-biofilm activity of Primula veris L. roots
Molecules, 30, 21
Phytochemical Profiling and Anti-Obesogenic Potential of Scrophularia aestivalis Griseb.
Revista Brasileira de Farmacognosia, 35, 734–753
Biological Effect of Alkaloid-Enriched Fractions and Reticuline from Stephania dielsiana
Plants, 14, 3263
Lipoxygenase Inhibitory Activity and Prostate Cancer Cytotoxicity of Sideritis scardica

2024

Pharmaceuticals, 17(7), 844
Inula salicina L.: Insights into its polyphenolic constituents and biological activity
Heliyon, 10(7)
Influence of natural deep eutectic solvents on phenolic extraction and activity
Plant Cell, Tissue and Organ Culture, 157
Phenolics biosynthetic plasticity of Artemisia alba Turra through tissue culture
Foods, 12(17)
Chemical Composition of Scaptotrigona mexicana Honey and Propolis
Diversity, 15(6), 759
Essential Oil Composition of Thymus Species Growing in Bulgaria
Molecules, 28(22), 7666
Phytochemical Profile and Biological Activity of Rosa damascena Extract
Plants, 12, 2541
Phenylethanoid and Flavone Glycoside Accumulation in Sideritis scardica
Foods, 11(18), 2844
Antioxidant Capacity of European Plum Cultivar “Cacanska Lepotica”
Plants, 11, 2753
Evolutionary Aspects of Hypericin Productivity in Hypericum Species
Phytomedicine, 86, 153098
Propolis of Stingless Bees: A Phytochemist's Guide
Foods, 10(1), 65
Health Effects of Edible Artemisia Species
Natural Product Research, 34(5)
Hypepontine – A New Quaternary Alkaloid with Antimicrobial Properties
Journal of Asian Natural Products Research, 22(9)
Alkaloids from Leptopyrum fumarioides and Immunomodulatory Activity
BMC Chemistry, 14, 73
Enhanced Antimicrobial Activity of Medicinal Plant Extracts

2019

PLoS ONE,
14(4),
e0216074
Phytochemical analysis of Vietnamese propolis produced by the stingless bee Lisotrigona cacciae
Phytotherapy Research,
33(3),
591-601
The chemical composition and events related to the cytotoxic effects of propolis on osteosarcoma cells: A comparative assessment of Colombian samples
DARU, Journal of Pharmaceutical Sciences,
27(1), 407-421
Genus Sideritis, section Empedoclia in southeastern Europe and Turkey – studies in ethnopharmacology and recent progress of biological activities
Phytomedicine,
55,
105-118
Plant-derived verbascoside and isoverbascoside regulate Toll-like receptor 2 and 4-driven neutrophils priming and activation

2018

Phytochemistry,
155,
1-11
The phytochemistry of the honeybee
Microporous and Mesoporous Materials,
263, 28-33
Nanostructured silver silica materials as potential propolis carriers
Food and Chemical Toxicology, 111,
605-615
New iridoids from Verbascum nobile and their effect on lectin-induced T cell activation and proliferation