Along with, or instead of these polyenes and {HEAD ~ silicon compounds}, crosslinkable prepolymers prepared from such polyenes and {TAIL ~ silicon compounds} may be included 
prepared from
Along with , or instead of these polyenes and { HEAD ~ silicon compounds } , crosslinkable prepolymers prepared from such polyenes and { TAIL ~ silicon compounds } may be included
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH