The solvent can be selected from {TAIL ~ ketones}, {HEAD ~ esters}, cyclic ethers and other kinds of polar solvents and may be a mixed solvent 
The solvent can be selected from { TAIL ~ ketones } , { HEAD ~ esters } , cyclic ethers and other kinds of polar solvents and may be a mixed solvent
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH