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