CCOC(=O)c1c(N2CCOCC2)[nH]c(=O)c(C(c2ccc(OC)cc2)c2c(O)c(C(=O)OCC)c(N3CCOCC3)[nH]c2=O)c1O
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?