CCOC(=O)N1CCN(C(=O)c2ccc(Cn3c(=S)[nH]c4cc(C(=O)OC)ccc4c3=O)cc2)CC1
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?