C/C(CCC(=O)OC[C@@H]1O[C@H](C#Cc2ccccc2)C=C[C@@H]1Oc1ccc(C)cc1)=N/O[C@@H](C)c1cn([C@H](CO)Cc2ccccc2)nn1
Hydrogen bond acceptor: The atom, ion, or molecule component of a hydrogen bond which does not supply the bridging (shared) hydrogen atom. How many hydrogen bond acceptors does the molecule have?