COC(=O)C/C=C\[C@@H](C)[C@@H](/C=N\O[C@@H](C)c1cn([C@H]2COC[C@H]2O)nn1)OC
The donor in a hydrogen bond is usually a strongly electronegative atom such as N, O, or F that is covalently bonded to a hydrogen bond. How many hydrogen bond donors does the molecule have?