The present invention is also directed to labeled compounds, e.g., methanol , acetates wherein {HEAD ~ the 13C atom} is directly bonded to {TAIL ~ exactly one or two deuterium atoms} 
is directly bonded to
The present invention is also directed to labeled compounds , e.g. , methanol , acetates wherein { HEAD ~ the 13C atom } is directly bonded to { TAIL ~ exactly one or two deuterium atoms }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL