Halyminine

Formula :
CAS : 129780-95-6 

From red alga halymenia porphyroides.

Halysin

Formula : C298-H475-N95-O105-S14
CAS : 137544-79-7 

Platelet membrane glycoprotein IIb-IIIa antagonist from Agkistrodon halys; an Arg-Gly-Asp-containing snake venom.

Hamacanthine A

Formula : C20-H14-Br2-N4-O
CAS : 160098-92-0 

A dihydropyrazinonediylbis(indole) alkaloid from deep-water marine sponge Hamacantha sp.