Synonyms: 1H-Naphtho[2,1-b]carbazol-1-ol,2,3,4,4a,5,6,8,13b-octahydro-4,4a-dimethyl-13b-(4-methyl-3-pentenyl)-,(1R,4S,4aR,13bS)-rel-(+)- (9CI); 1H-Naphtho[2,1-b]carbazol-1-ol,2,3,4,4a,5,6,8,13b-octahydro-4,4a-dimethyl-13b-(4-methyl-3-pentenyl)-, (1a,4a,4aa,13ba)-(+)-; (+)-Tubigensine a; Tubigensina; Tubigensine a; Tubingensin A