27164-43-8 Azirino(2',3':3,4)pyrrolo(1,2-a)(1,3)oxazino(4,5-b)indole-2,5,8(1H)-trione, 4,4a,10,10a,11,11a-hexahydro-6-methoxy-7,11-dimethyl-, (4aS-(4aalpha,10abeta,11abeta,11bR*))- Mitiromycin