COC(=O)CCC(=O)OC1(C)C(=O)C2=CN(Cc3ccc4c(c3)OCO4)C(c3ccc(OC)cc3)=CC2=C(Br)C1=O
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?