(5S,6aR)-5-Chloro-4,5,6,6a-tetrahydro-6a-hydroxy-3-imino-3H-3a-azapentalene 1H-Pyrrolizin-7a(5H)-ol, 2-chloro-2,3-dihydro-5-imino-, (2S-trans)- 71806-55-8 Clazamycin A