Question: Is it known if this drug is the first approved in its class, regardless of the indication or route of administration, acting on a specific target?
 The Compound has the SMILES Nc1ccncc1N.O=P(O)(O)O.
Answer: No
{#Question|Q!}: {quest#}
{#Constraint:|Description:|!} The {#Molecule|Compound|Chemical!} {#has the|can be represented with the!} {SMILES__description} {SMILES#}.
{#Answer|Result|Answer!}: {answ#}
Nc1ccncc1N.O=P(O)(O)O
Nc1ccncc1N.O=P(O)(O)O
phosphoric acid;pyridine-3,4-diamine
Is it known if this drug is the first approved in its class, regardless of the indication or route of administration, acting on a specific target?