For example, naphthyl may include {TAIL ~ its hydrogenated derivatives} such as {HEAD ~ tetrahydronaphthyl} 
For example , naphthyl may include { TAIL ~ its hydrogenated derivatives } such as { HEAD ~ tetrahydronaphthyl }
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD