The importance of {TAIL ~ the production} of the separate chiral isomers of the racemic mixtures resides in the isolation of {HEAD ~ the isomers} which frequently have different biological activities 
The importance of { TAIL ~ the production } of the separate chiral isomers of the racemic mixtures resides in the isolation of { HEAD ~ the isomers } which frequently have different biological activities
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH