Atomic structure
There is only one chemically distinct structure:
C[C@@H]1O[C@H](OP(=O)(O)OP(=O)(O)OC[C@H]2O[C@@H](n3cnc4c(=O)[nH]c(N)nc43)[C@H](O)[C@@H]2O)[C@@H](O)[C@H](O)[C@@H]1O