N.N.N.O=P(O)(OC[C@H]1O[C@@H](n2cnc3cncnc32)[C@H](O)[C@@H]1O)OP(=O)(O)OP(=O)(O)OP(=O)(O)OC[C@H]1O[C@@H](n2cnc3cncnc32)[C@H](O)[C@@H]1O
Drug-like molecules usually have no more than 5 Hydrogen bond donor. How many hydrogen bond donor does the molecule have?