The molecule is a (14)C-modified compound that is erythromycin A in which one of the methyl groups of the dimethylnitrilo group has a (14)C label. It is used in a breath test to detect liver cytochrome P450 enzyme (CYP3A4) activity in humans. It has a role as a probe. It is an erythromycin, a cyclic ketone and a (14)C-modified compound.
(3R,4S,5S,6R,7R,9R,11R,12R,13S,14R)-14-ethyl-7,12,13-trihydroxy-4-[(2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyloxan-2-yl]oxy-6-[(2S,3R,4S,6R)-3-hydroxy-6-methyl-4-[methyl((114C)methyl)amino]oxan-2-yl]oxy-3,5,7,9,11,13-hexamethyl-oxacyclotetradecane-2,10-dione