Marine organisms provide a valuable source for natural products. In recent years,
iminoquinone alkaloids including makaluvamines, isobatzellines, tsitsikammamines and …

Abstract Two bispyrroloiminoquinone alkaloids, wakayin (1) and a new natural product 16‐
hydroxy‐17‐oxindole wakayin (2), were isolated from a Thai collection of the ascidian …

Publisher Summary Since the first isolation of the alkaloids containing quinolinequinone and
quinolinequinoneimine units, phomazarin and calliactine, respectively, more than 30 …

A new sesquiterpenoid aminoquinone, cyclosmenospongine (1), containing a dihydropyran
ring, was isolated from an Australian marine sponge Spongia sp., along with the known …

A new stereoisomer Meso-araguspongine C together with nine reported macrocyclic bis-
quinolizidine alkaloids araguspongines A, C, E, L, N− P, petrosin, and petrosin A were …

Six new cytotoxic polycyclic alkaloids containing an 8-hydroxyquinoline moiety, njaoamines
A–F (1–6), have been isolated from the 2-propanol extract of the sponge Reniera sp …

The structures of two new bispyrroloiminoquinone alkaloids, tsitsikammamine A (1) and
tsitsikammamine B (2) and two new pyrroloiminoquinone alkaloids 14-bromodiscorhabdin C …

Syntheses of makaluvamines A, B, C, D and E (1–5), new members of
tetrahydropyrroloiminoquinone alkaloids, have been successfully carried out. Particularly …

6, 7-Dimethoxy-4-methyl-5-nitroquinoline has been transformed in eight steps into 6-chloro-
1, 3, 4, 5-tetrahydro-7, 8-dimethooxy-1-methylpyrrolo [4, 3, 2-] quinoline, 7 (previously …

Two novel pyrroloquinoline ribosides, N-1-β-D-ribofuranosyldamirone C (), and N-1-β-D-
ribofuranosylmakaluvamine I () were isolated from a new species of South African …