O=C(COc1ccc2c(-c3ccccc3)cc(=O)oc2c1)N[C@@H](Cc1c[nH]c2ccc(O)cc12)C(=O)O
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?