{HEAD ~ A photosensitive resin composition} 3 wherein X is absent, j/j+k is from 0.26 to 0.65, t is 1, n is an integer of 100 to 130, Z is sodium, and {TAIL ~ the aromatic ketone} is Michlers ketone 
{ HEAD ~ A photosensitive resin composition } 3 wherein X is absent , j / j+k is from 0.26 to 0.65 , t is 1 , n is an integer of 100 to 130 , Z is sodium , and { TAIL ~ the aromatic ketone } is Michlers ketone
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH