Synonyms: Isotazettine(6CI); Pretazettine (8CI); Tazettine, 6a-deoxy-8-hydroxy-, (6ab,8b)-; 8H-[1,3]Dioxolo[6,7][2]benzopyrano[3,4-c]indole,tazettine deriv.; (+)-Pretazettine; 6a-Deoxy-8b-hydroxy-6ab-tazettine;8H-[1,3]Dioxolo[6,7][2]benzopyrano[3,4-c]indol-8-ol,3,4,4a,5,6,6a-hexahydro-3-methoxy-5-methyl-, [3S-(3a,4aa,6aa,8a,13bR*)]-; Pretazetine