P(=O)(O)(OCC1OC(CC1OP(=O)(O)OCC2OC(CC2O)N3C=C(C)C(=O)NC3=O)N4C=C(C)C(=O)NC4=O)OC5CC(OC5COP(=O)(O)O)N6C=CC(N)=NC6=O