. "methacholine compounds"@en . . "C0025599" . . "group of compounds that are derivatives of beta-methylacetylcholine (methacholine)."@en . . "D02.675.276.534" . . . . . . "D008688" . "methacholine compounds"@en . . "D02.092.877.883.555" . "methacholine compounds"@en .