Ophiuroidine, the first indolo[2,1-b]quinazoline alkaloid from the Caribbean brittle star Ophiocoma riisei

Ophiuroidine, the first indolo[2,1-b]quinazoline alkaloid from the Caribbean brittle star Ophiocoma riisei Ophiuroidine, the first indolo[2,1-b]quinazoline alkaloid from the Caribbean brittle star Ophiocoma riisei β-Carboline-type indole alkaloid glycosides from Ophiorrhiza trichocarpon Ophiorrhizine, a new quaternary indole alkaloid related to cinchonamine, from Ophiorrhiza major Ridl. Structure of ophiorines A and B; novel type gluco indole alkaloids isolated from ophiorrhiza spp. Structure and Cytotoxicity of Phidianidines A and B: First Finding of 1,2,4-Oxadiazole System in a Marine Natural Product Two new indole alkaloids from Nauclea officinalis Isomalindine-16-carboxylate, a Zwitterionic Alkaloid from Ophiorrhiza cf. communis A Cyclopeptide and a Tetrahydroisoquinoline Alkaloid from Ophiorrhiza nutans Marine alkaloids—6. The first naturally occurring bromo-substituted quinoline from Flustra foliacea