C[C@@H](C(=O)O)N1C(c2ccco2)=C(/C(C=O)=C\c2ccco2)C(=O)/C1=C\c1ccco1
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?