title: A new antitumor complex, WF-1360, WF-1360A, B, C, D, E and F.
abstract: A complex of the new antitumor antibiotics (WF-1360, WF-1360A, B, C, D, E and F) was produced by Rhizopus sp. No. F-1360. Structural studies of these compounds suggested that they were novel 16-membered-ring lactones having an oxazole ring in their structures. WF-1360 was found to be identical with rhizoxin (1) and WF-1360B, C, E and F were determined to be homologues of 1 with structures 2, 3, 4 and 5, respectively. These compounds were cytotoxic when tested on P388 leukemia cells in vitro. WF-1360 was highly active against leukemia L1210 and melanoma B16. They also exhibited potent antifungal activities, but weak antimicrobial activities against some Gram-positive or negative bacteria.
mesh_terms: D000818:Animals; D000903:Antibiotics, Antineoplastic / Q000302:isolation & purification* / Q000494:pharmacology / Q000633:toxicity; D001419:Bacteria / Q000187:drug effects; D055598:Chemical Phenomena; D002621:Chemistry; D005260:Female; D005285:Fermentation; D007783:Lactones / Q000302:isolation & purification / Q000494:pharmacology; D007939:Leukemia L1210 / Q000188:drug therapy; D018942:Macrolides; D009682:Magnetic Resonance Spectroscopy; D051379:Mice; D008815:Mice, Inbred Strains; D012233:Rhizopus / Q000378:metabolism*
chemical_list: D000903:Antibiotics, Antineoplastic; D007783:Lactones; D018942:Macrolides; C041443:rhizoxin