Atomic structure
There is only one chemically distinct structure:
Nc1nc2c(ncn2[C@H]2C[C@H](OP(=O)(O)OC[C@H]3O[C@@H](n4cnc5c(=O)[nH]c(N)nc54)C[C@@H]3OP(=O)(O)OC[C@H]3O[C@@H](n4cnc5c(=O)[nH]c(N)nc54)C[C@@H]3OP(=O)(O)OC[C@H]3O[C@@H](n4cnc5c(=O)[nH]c(N)nc54)C[C@@H]3OP(=O)(O)OC[C@H]3O[C@@H](n4cnc5c(=O)[nH]c(N)nc54)C[C@@H]3OP(=O)(O)OC[C@H]3O[C@@H](n4cnc5c(=O)[nH]c(N)nc54)C[C@@H]3O)[C@@H](CO)O2)c(=O)[nH]1Warning = sub-repeat ending at xXP?: large unit count (9) was reduced to 5