COC(=O)c1cc(NC(=O)CCc2c(C)nc3c4c(C)cc(C)nc4nn3c2C)cc(C(=O)OC)c1
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?