COC(=O)C1=C(C(=O)OC)C2N(Cc3ccccc3)c3ccccc3C23CC(C(=O)OC)N(C(=O)Nc2ccc(C(F)(F)F)cc2)C3=N1
Hydrogen bond acceptor is the chemical compound which contains the lone electron pairs that participate in the hydrogen bond formation. How many hydrogen bond acceptors does the molecule contain?