6H-4,12b-Methano-1H,5H-2-oxa-5a,12-diazabenz[a]indeno[1,7-ef]azulene-1,5-dione, 2a-ethyl-2a,3,4,7,12,12c-hexahydro-3-iodo- AIDS-133013 AIDS133013 Catharanthine lactam NSC628065