SMILES: C1C2C(=C(C3=NC4=C(N=C3O2)N=C(NC4=O)N)O)OP(=O)(O1)O
Description: The molecule is a linear-fused organic heterotetracyclic compound consisting of a [1,3,2]dioxaphosphinane fused to a pyran ring which is in turn fused to a pteridine ring system. It is an organic heterotetracyclic compound, an oxacycle and an organonitrogen heterocyclic compound.