O=C1/C(=C/c2ccc(Cl)cc2)N=C(c2ccccc2)N1C1Nc2cc3c(cc2S1)NC(N1C(=O)/C(=C/c2ccc(Cl)cc2)N=C1c1ccccc1)S3
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?