COC(=O)C1=C[C@@H](C(=O)OC)[C@@H]2C3=C(C(=O)C2(C)C)[C@H](C)n2c(=O)n(C)c(=O)n2[C@@H]3C1
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?