Synonyms: 2-Butenoicacid, 2-methyl-,(1,5,6,7,9,10,13,14,14a,15-decahydro-7-hydroxy-2,11-dimethoxy-3,12,16-trimethyl-1,4,10,13-tetraoxo-6,15-imino-4H-isoquino[3,2-b][3]benzazocin-9-yl)methylester, [6S-[6a,7a,9b(Z),14aa,15a]]-;6,15-Imino-4H-isoquino[3,2-b][3]benzazocine, 2-butenoic acid deriv.;Renieramycin E