Question: How many hydrogen bond acceptors are there in this compound, calculated according to Lipinski's original rules (i.e., counting N and O atoms)?
 The Chemical can be represented with the SMILES Cl.Cl.NCCNCCNCCN.
Answer: 4
{#Question|Q!}: {quest#}
{#Constraint:|Description:|!} The {#Molecule|Compound|Chemical!} {#has the|can be represented with the!} {SMILES__description} {SMILES#}.
{#Answer|Result|Answer!}: {answ#}
Cl.Cl.NCCNCCNCCN
Cl.Cl.NCCNCCNCCN
N'-[2-(2-aminoethylamino)ethyl]ethane-1,2-diamine;dihydrochloride
How many hydrogen bond acceptors are there in this compound, calculated according to Lipinski's original rules (i.e., counting N and O atoms)?
4