"FDA"^^ . "METHACHOLINEPTFDA03V657ZD3V" . . "C0600370"^^ . "C61837"^^ . "Methacholine"^^ . . "Methacholine"^^ . "Organic Chemical"^^ . "Indicator, Reagent, or Diagnostic Aid"^^ . . "55-92-5"^^ . . "C8H18NO2"^^ . "MethacholinePTNCI" . "CHEBI:6804"^^ . . "03V657ZD3V"^^ . "Methacholine"^^ .