O=C1C2C(c3cccc(/C=C/c4ccccc4)c3)CC=CC2C(c2ccc3ccccc3c2)N1Cc1ccccc1
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?