Atomic structure
There is only one chemically distinct structure:
Cc1cn([C@@H]2O[C@H](COP(=O)(O)OP(=O)(O)O[C@@H]3O[C@@H](C)C(=O)[C@@H](O)[C@H]3O)[C@@H](O)[C@H]2O)c(=O)[nH]c1=O