13C, lH,(m, J (Hz)) 130,,(m, J (Hz)) 13C, 6,(m, J (Hz)) l3C, lH,(m, J (Hz)) 2 137.1 136.4 132.4
7.13 (s) 138.6 2a 121.6 122.8 120.3 118.8 3 19.3 2.99 (t, 7.3) 19.6 2.84 (t, 7.5) 19.2 2.96 (t …

Structurally unique new sesquiterpenoid quinones dactyloquinone A (1) and B (2), each
possessing a dihydropyran moiety, were isolated from an Okinawan sponge Dactylospongia …

An extract of the Great Australian Bight marine sponge Callyspongia sp.(CMB-01152)
displayed inhibitory activity against the neurodegenerative disease kinase targets casein …

Sesquiterpene hydroxyquinones and hydroquinones have been isolated from various
sponges. 3-16 The sesquiterpene moiety of these metabolites usually have the normal …

A new entry into pyrroloiminoquinone marine alkaloids, makaluvamines, has been
developed. The key 1, 3, 4, 5-tetrahydropyrrolo [4, 3, 2-de] quinoline intermediates 11 and …

Halitulin (2), a novel bisquinolinylpyrrole has been isolated from the sponge Haliclona
tulearensis. Its structure was elucidated mainly on the basis of spectroscopic data as well as …

Three bromopyrrole alkaloids (1–3) were isolated from the acetone extracts of Didiscus
oxeata during chemical and biological investigation of Caribbean and Indo-Pacific marine …

Makaluvamine C is a pyrroloiminoquinone which has been isolated from marine sponges.
This molecule has been synthesized in 13 steps from p-anisidine. The key steps in this …

A detailed chemical analysis of a Philippine marine sponge Smenospongia sp. has been
performed. This study yielded four new metabolites, 5-bromo-l-tryptophan (1), 5 …

A highly methylated cytotoxic tripeptide, milnamide A (1), along with jasplakinolide (3) was
isolated from Papua New Guinean collections of the Axinellida sponge Auletta cf. constricta …