CC(=O)OC[C@@H]1O[C@@H](O/N=C2/C[C@@H](O)[C@@H](O)[C@H]3[C@@H]2CC[C@@H]2C(=O)N(C[C@@H]4CCCO4)C(=O)[C@H]23)[C@H](OC(C)=O)[C@H](OC(C)=O)[C@@H]1OC(C)=O
How many hydrogen bond donors does the molecule have?