reacting the oligomeric and the thiadiazole succinic anhydride with pentamethylene diamine to produce {TAIL ~ the product} of {HEAD ~ pentamethylene bis succinimide}; and 
reacting the oligomeric and the thiadiazole succinic anhydride with pentamethylene diamine to produce { TAIL ~ the product } of { HEAD ~ pentamethylene bis succinimide } ; and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH