The diphenyl sulfone derivatives previously utilized as a color developing agent or an image stabilizer in {HEAD ~ a thermosensitive color developing layer} of {TAIL ~ a thermosensitive recording medium} were mainly the derivatives containing hydroxyl groups in both ends 
of
The diphenyl sulfone derivatives previously utilized as a color developing agent or an image stabilizer in { HEAD ~ a thermosensitive color developing layer } of { TAIL ~ a thermosensitive recording medium } were mainly the derivatives containing hydroxyl groups in both ends
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH