{HEAD ~ a curing agent} selected from {TAIL ~ the class} consisting of aminoplast resins, phenoplast resins, blocked or semiblocked polyisocyanates 
selected from
{ HEAD ~ a curing agent } selected from { TAIL ~ the class } consisting of aminoplast resins , phenoplast resins , blocked or semiblocked polyisocyanates
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH