pubmed-article:7844034 | pubmed:abstractText | During the course of our screening program for natural product drugs effective against multidrug resistant cells by using adriamycin resistant HL-60 cells, we have discovered a new 12 membered macrolide FD-895 in the fermentation broth of Streptomyces hygroscopicus A-9561 isolated from a soil sample collected at Iriomote Island, Okinawa prefecture, Japan. FD-895 showed stronger cytocidal activities against in vitro tumor cell lines than adriamycin. FD-895 had the same IC50 values against parent and adriamycin resistant HL-60 cells. | lld:pubmed |