Cn1ccc(C(=O)NCCN(CCNC(=O)c2ccn(C)c(=O)c2O)CCNC(=O)c2cccc(=O)n2O)c(O)c1=O
Molecules possible for drug usually have no more than 5 Hydrogen bond acceptor. How many hydrogen bond acceptors does the molecule have?