That is, as described previously, the diazotizing reagent and the coupling reagent together with {HEAD ~ a necessary amount} of {TAIL ~ an acid} must be placed in the pores of the porous body 
of
That is , as described previously , the diazotizing reagent and the coupling reagent together with { HEAD ~ a necessary amount } of { TAIL ~ an acid } must be placed in the pores of the porous body
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 TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH