O=C(C1=C[C@@H](C2CCCCC2)C[C@@H](OCc2ccc(CO)cc2)O1)N1CCN(Cc2ccccc2)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?