Seven new guanidine alkaloids (1− 7) together with the known batzelladines A, F, H, and L,
ptilomycalin A, and fromiamycalin were isolated from the Caribbean marine sponges …

Five new polycyclic guanidine alkaloids, 16β-hydroxycrambescidin 359 (1), batzelladines K,
L, M, and N (2–5), along with the previously reported ptilomycalin A (6), crambescidine 800 …

The bioassay-guided fractionation of the cytotoxic crude gum obtained from the Caribbean
sponge Monanchora unguifera led to the isolation and characterization of the new …

A new polycyclic guanidine alkaloid, ptilomycalin D, and the known crambescidic acid were
isolated from the marine sponge Monanchora dianchora collected in Nosy-Be, northwest of …

Sessile marine sponges provide an abundance of unique and diversified scaffolds. In
particular, marine guanidine alkaloids display a very wide range of biological applications. A …

HPLC-UV-ELSD-MS-guided fractionation of the anti-parasitic extract obtained from the
marine sponge Monanchora arbuscula, collected off the southeastern coast of Brazil, led to …

Four bicyclic and three pentacyclic guanidine alkaloids (1–7) were isolated from a French
Polynesian Monanchora n. sp. sponge, along with the known alkaloids monalidine A (8) …

In our continuing program to identify bioactive compounds from marine invertebrates, the
MeOH/EtOAc (1: 1) extract of three collections of the Madagascar sponge, Biemna laboutei …

A new pentacyclic guanidine alkaloid, monanchomycalin C (1), along with the earlier known
ptilomycalin A (2), were isolated from the Far-Eastern marine sponge Monanchora pulchra …

Two marine sponges of the genus Monanchora (Poecilosclerida, Crambeidae) have been
found to contain new polycyclic guanidine alkaloids bearing the (5, 6, 8 b) …