Antibacterial triterpenes from the threatened wood-decay fungus Fomitopsis rosea     

Milena Popova  Boryana Trusheva  Melania Gyosheva  Iva Tsvetkova  Vassya Bankova 《Fitoterapia》2009

From a biologically active extract from the fungus Fomitopsis rosea, two new lanostane triterpenes were isolated, 3α-(3′-butylcarboxyacetoxy)oxepanoquercinic acid C 1 and 3α-hydroxy-24-methylene-23-oxolanost-8-en-26-carboxylic acid 2, along with three known triterpenes, 3–5, and the epidioxy sterol derivative 6. The structures of the compounds were elucidated based on their spectral properties. All triterpenes demonstrated antibacterial activity against S. aureus but possessed no antiradical activity against DPPH radicals.  相似文献   

New polyisoprenylated benzophenones from Venezuelan propolis     

Trusheva B  Popova M  Naydenski H  Tsvetkova I  Gregorio Rodriguez J  Bankova V 《Fitoterapia》2004,75(7-8):683-689

Two new polyisoprenylated benzophenones, 18-ethyloxy-17-hydroxy-17,18-dihydroscrobiculatone A and 18-ethyloxy-17-hydroxy-17,18-dihydroscrobiculatone B, together with the known scrobiculatones A and B, were isolated from Venezuelan propolis. The scrobiculatones A and B showed significant antibacterial activity and moderate toxicity to Artemia salina nauplii.  相似文献