Synonyms: Alstophyllan,18,19-didehydro-; Macrosalhine methine, anhydro- (8CI); (-)-Anhydromacrosalhinemethine; (-)-Anhydromacrosaline methine;6,13-Iminopyrano[3',4':5,6]cyclooct[1,2-b]indole,4-ethenyl-1,4a,5,6,7,12,13,13a-octahydro-7,14-dimethyl-, [4aR-(4aa,6b,13b,13aa)]-; Anhydromacrosalhine methine