申请人:Li Liang
公开号:US20120165227A1
公开(公告)日:2012-06-28
The present disclosure includes compounds of Formula I: wherein R
1
-R
3
, Ar, and n are as defined herein, and methods for the quantification of carboxylic acids in samples, specifically biological samples, using the compounds of Formula I. The compounds of Formula I are novel stable isotopic reagents that are useful in differential isotopic labeling methods.