{TAIL ~ A suitable phenol formaldehyde} is m cresol formaldehyde and a suitable sensitizer is {HEAD ~ a naphthoquinone diazide sulfonic acid ester} 
{ TAIL ~ A suitable phenol formaldehyde } is m cresol formaldehyde and a suitable sensitizer is { HEAD ~ a naphthoquinone diazide sulfonic acid ester }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD