COc1ccc(/C=C2\CCC(C)C3=C(c4ccc(OC)c(OC)c4)C(C#N)=C(N)OC32)cc1OC
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?