title: [Composition of spongopurine, a new purine base in nature].
mesh_terms: D000225:Adenine / Q000031:analogs & derivatives; D000468:Alkalies; D000818:Animals; D011161:Porifera / Q000737:chemistry*; D011687:Purines
chemical_list: D000468:Alkalies; D011687:Purines; D000225:Adenine; C030985:purine
keywords: ADENINE/related compounds; PORIFERA/chemistry