O=C1C2Cc3c(n(C(=O)c4ccccc4)c4ccccc34)CC2C(=O)N1c1ccc(Nc2ccc(N3C(=O)C4Cc5c(n(C(=O)c6ccccc6)c6ccccc56)CC4C3=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?