3-[8-((2S,3S,4R)-2,3,4,5-TETRAHYDROXYPENTYL)-2,4,7-TRIOXO-1,3,8-TRIHYDROPTERIDIN-6-YL]PROPANOIC ACID C(CC(=O)O)C1=NC2=C(NC(=O)NC2=O)N(C1=O)C[C@@H]([C@@H]([C@@H](CO)O)O)O CRM