CCOc1ccc(CCN2C(=S)N([C@@H](CC(C)C)CN3CCCC3CN3C(=S)NC[C@@H]3CC(C)C)C[C@@H]2Cc2ccc(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?