CC(=O)Oc1ccc2c(c1)c1c(OC(C)=O)c3ccccc3c(OC(C)=O)c1n2Cc1cccc(C)c1
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?