CCOC(=O)c1cc2c3c(c(O)c(OC)c2s1)N(C(=O)c1cc2c4c(c(O)c(OC)c2s1)N(C(C)=O)CC4)CC3
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?