Cc1cc(OCC(=O)N2C[C@@H]3C[C@H](C2)Cn2c3cccc2=O)c2c(C)cc(=O)oc2c1
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?