A purified isolate of an actinomycete identified as ATCC 39364 is capable of producing the antimicrobial/antitumor compound 2-amino-1,9-dihydro-6H-purine-6-one-7-oxide, commonly known as guanine-N.sup.7 -oxide. Guanine-N.sup.7 -oxide is produced by cultivating isolate ATCC 39364 under aerobic conditions in a culture medium containing assimilable sources of carbon and nitrogen until a substantial amount of the compound is produced and thereafter isolating the compound. The antibiotic/antitumor compound guanine-N.sup.7 -oxide and pharmaceutical compositions comprising this compound or one of its pharmaceutically acceptable salts together with a pharmaceutically acceptable carrier are also disclosed as is a method of treating microbial infections in a mammal or of treating tumors in a mammal.
一种被鉴定为A
TCC 39364的放线菌纯化分离物能够产生抗微
生物/抗肿瘤化合物2-
氨基-1,9-二氢-
6H-嘌呤-6-酮-7-氧化物,通常称为
鸟嘌呤-N.sup.7-氧化物。通过在含可利用的碳和氮源的
培养基中,以需氧条件培养分离物A
TCC 39364直至产生大量化合物,然后分离化合物来制备
鸟嘌呤-N.sup.7-氧化物。本发明还披露了抗生素/抗肿瘤化合物
鸟嘌呤-N.sup.7-氧化物以及包括该化合物或其药学上可接受的盐之一和药学上可接受的载体的制药组合物,以及一种治疗哺乳动物微
生物感染或治疗哺乳动物肿瘤的方法。