{HEAD ~ A process} for {TAIL ~ the preparation} of an alkyl methacrylate, which process comprises: 
{ HEAD ~ A process } for { TAIL ~ the preparation } of an alkyl methacrylate , which process comprises :
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH