It also relates to {TAIL ~ novel compounds} which can be reduced to provide a detectable species at {HEAD ~ a pH} of 9 or less 
It also relates to { TAIL ~ novel compounds } which can be reduced to provide a detectable species at { HEAD ~ a pH } of 9 or less
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH