CCCCc1cc(=O)oc2cc(OC(C)C(=O)NC[C@H]3CC[C@H](C(=O)O)CC3)c(Cl)cc12
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?