Synonyms: 18-Noradifoline,5-decarboxy-20,21-didehydro-16-de(methoxycarbonyl)-10,21-dideoxy-16-formyl-3,4,5,6,16,17-hexahydro-4,17-dimethyl-19-oxo-,(3b,15a,16a,17a)-;8H-10-Oxa-1,7b-diazabenzo[5,6]cyclohepta[1,2,3-jk]fluorene-12-carboxaldehyde,1,2,3,11,12,12a,13,13a-octahydro-1,11-dimethyl-8-oxo-, [11S-(11a,12a,12aa,13ab)]-; Correantine B