1.polythene2.polyethylene
1.butadiene C4H62.biethylene
1.olefine2.alkene (chemistry)
1.vinyl2.vinyl group (chemistry)
vinyl chloride (chloroethene C2H3Cl)
leukotriene (biochemistry)
polytetrafluoroethylene (PTFE), trademarked as Teflon
cyclopentene C5H8 (ring of five carbon atoms)