Q: How many hydrogen bond donors are there in this compound, calculated according to Lipinski's original rules (i.e., counting NH and OH groups)?
 The Compound can be represented with the SMILES CCCOCCn1c(=O)c(N2CCN(CCO)CC2)nc2cnc(-c3ccc(OC)nc3)cc21.
Answer: 1
{#Question|Q!}: {quest#}
{#Constraint:|Description:|!} The {#Molecule|Compound|Chemical!} {#has the|can be represented with the!} {SMILES__description} {SMILES#}.
{#Answer|Result|Answer!}: {answ#}
CCCOCCn1c(=O)c(N2CCN(CCO)CC2)nc2cnc(-c3ccc(OC)nc3)cc21
CCCOCCn1c(=O)c(N2CCN(CCO)CC2)nc2cnc(-c3ccc(OC)nc3)cc21
3-[4-(2-hydroxyethyl)piperazin-1-yl]-7-(6-methoxypyridin-3-yl)-1-(2-propoxyethyl)pyrido[3,4-b]pyrazin-2-one
How many hydrogen bond donors are there in this compound, calculated according to Lipinski's original rules (i.e., counting NH and OH groups)?