Isotope labelled (-)-2-Methylisoborneol (M314000), which is a derivative of Camphor (1) (C165805). (-)-2-Methylisoborneol is a flavor component of Robusta coffee responsible for the off-flavour aroma (2). Drinking water contaminant candidate list 3 (CCL 3) compound as per United States Environmental Protection Agency (EPA). Environmental contaminants; Food contaminants.