Hydrocarbyl is an organic group composed solely of carbon and, as appropriate, hydrogen, and may be aliphatic, alicyclic, aromatic, or combinations thereof, being aliphatically saturated or unsaturated, normally having not more than {HEAD ~ about one site} of {TAIL ~ unsaturation} 
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Hydrocarbyl is an organic group composed solely of carbon and , as appropriate , hydrogen , and may be aliphatic , alicyclic , aromatic , or combinations thereof , being aliphatically saturated or unsaturated , normally having not more than { HEAD ~ about one site } of { TAIL ~ unsaturation }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL