C=CCn1c(-c2ccc(/N=N/Nc3ccc(-c4n[nH]c(=S)n4CC=C)cc3)cc2)n[nH]c1=S
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?