O=C1c2ccc3c4ccc5c6c(ccc(c7ccc(c2c37)C(=O)N1CCN1CCCCC1)c64)C(=O)N(CCN1CCCCC1)C5=O
Molecules possible for drug usually have no more than 5 Hydrogen bond acceptor. How many hydrogen bond acceptors does the molecule have?