title: On the structures of crambescins B and C1.
abstract: Revised structures have been assigned to the cyclic guanidine-containing crambescins B [3] and C1 [5], from the Mediterranean sponge Crambe crambe. The revisions were based on the fabms/cid/ms spectra of the [M+H]+ ions from crambescins B and C1 and hrfabms measurements on key fragment ions in the ms/ms spectra, which identify losses of C9H19 and C8H18N3O side-chains.
authors.affiliation: Roger Adams Laboratory, University of Illinois, Urbana 61801.
authors.forename: E A
authors.initials: EA
authors.lastname: Jares-Erijman
authors.forename: A A
authors.initials: AA
authors.lastname: Ingrum
authors.forename: F
authors.initials: F
authors.lastname: Sun
authors.forename: K L
authors.initials: KL
authors.lastname: Rinehart
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D007939:Leukemia L1210 / Q000188:drug therapy; D008387:Marine Toxins / Q000737:chemistry*; D051379:Mice; D011161:Porifera / Q000737:chemistry*; D011743:Pyrimidines / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D013141:Spiro Compounds / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology
chemical_list: D000970:Antineoplastic Agents; D008387:Marine Toxins; D011743:Pyrimidines; D013141:Spiro Compounds; C086364:crambescin B; C086365:crambescin C1