The term “sulfoxide” refers to a group —SR, in which {HEAD ~ R} is {TAIL ~ alkyl}, aryl, or heteroaryl 
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The term “ sulfoxide ” refers to a group — SR , in which { HEAD ~ R } is { TAIL ~ alkyl } , aryl , or heteroaryl
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH