Antibiotics TM-531 B and TM-531 C
AssigneeTaisho Pharmaceutical Co., Ltd.
InventorsTaku Mizutani, Michio Yamagishi, Kazutoshi Mizoue, Akira Kawashima, Sadafumi Omura, Noboru Otake, Haruo Seto
Life of this patent
Estimating the term…
Abstract
The novel antibiotics represented by the formula ##STR1## wherein either (a) R.sup.1 is hydroxy and R.sup.2 is hydrogen, or (b) R.sup.1 is methoxy and R.sup.2 is hydroxy, and the salt thereof, are produced by the cultivation of the organism Streptomyces hygroscopicus TM-531 under aerobic conditions. They are separated from coproduced Antibiotic TM-531 as disclosed in U.S. Pat. No. 4,269,971 and from each other by chromatography on silica gel.
Claims3
A compound of the formula ##STR6## wherein either (a) R.sup.1 is hydroxy and R.sup.2 is hydrogen, or (b) R.sup.1 is methoxy and R.sup.2 is hydroxy, and the salt thereof.
Dependencies are inferred from the claim text.