(1)Benzopyrano(2',3':6,7)naphth(2,1-g)oxazolo(3,2-b)isoquinoline-8,14,15,17-tetrone, 1,2,3a,4-tetrahydro-12,16-dihydroxy-11-methoxy-3a-methyl- 113537-08-9 Antibiotic 167A Antibiotic 4181-2