{HEAD ~ A composition} 6 containing a polycarboxylic acid anhydride as {TAIL ~ curing agent} 
{ HEAD ~ A composition } 6 containing a polycarboxylic acid anhydride as { TAIL ~ curing agent }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL