Oc1ccc(C[C@H]2CN([C@@H](Cc3cccc(O)c3)CN3CCC[C@@H]3CN3C(=S)NC[C@@H]3Cc3ccccc3)C(=S)N2CC2CCCCC2)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?