Isolation and synthesis of a novel β-carboline guanidine derivative tiruchanduramine from the Indian ascidian Synoicum macroglossum

Isolation and synthesis of a novel β-carboline guanidine derivative tiruchanduramine from the Indian ascidian Synoicum macroglossum Isolation and synthesis of a novel β-carboline guanidine derivative tiruchanduramine from the Indian ascidian Synoicum macroglossum Beta-carboline alkaloids derived from the ascidian Synoicum sp. Alkaloids from the Tunicate Polycarpa aurata from Chuuk Atoll N-Methyl-β-carbolinium Salts and an N-Methylated 8-Oxoisoguanine as Acetylcholinesterase Inhibitors from a Solitary Ascidian, Cnemidocarpa irene Eudistomidins E and F, new β-carboline alkaloids from the okinawan marine tunicate Eudistoma glaucus Three New Pyridoacridine Type Alkaloids from a Singaporean Ascidian Picrasidine-T, a dimeric β-carboline alkaloid from Picrasma quassioides Nostocarboline:  Isolation and Synthesis of a New Cholinesterase Inhibitor from<i>Nostoc</i>78-12A A new cinnamamide derivative and two new β-carboline alkaloids from the stems of Picrasma quassioides