Antimicrobial lavandulylated flavonoids from a sponge-derived actinomycete.

Analysis of an antimicrobial culture broth extract of the sponge-derived actinomycete sp. (strain G246) led to the isolation of two new lavandulylated flavonoids, 6-lavandulyl-7-methoxy-5,2',4'-trihydroxylflavanone () and 5'-lavandulyl-4'-methoxy-2,4,2',6'-tetrahydroxylchalcone (), along with eight known compounds -. Their structures were established by spectral data analysis, including MS, 1D, 2D-NMR and CD.

Antimicrobial Metabolites from a Marine-Derived Actinomycete in Vietnam's East Sea.

Two new compounds, a quinoline alkaloid (1) and a 1,4-dioxane derivative (2), were isolated from culture broth of the marine-derived actinomycete Micromonospora sp. (strain G019) by bioassay-guided fractionation. This actinomycete strain was isolated from sediment, collected at Cát Bà Peninsula, Vietnam.