COc1cc(C2C(C(=O)c3ccc4c(c3)CC(C)O4)=C(O)C(=O)N2CC2CCCO2)cc(OC)c1OC
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?