CCOC(=O)C1=C(N)Oc2ccccc2C12C(=O)N(CC(=O)OC)C(CC(=O)OC)=C2C(=O)OC
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?