I1S1O1B3U1T1Y4L1E1N1E1S1
17 points
ISOBUTYLENES is validvalid
ISOBUTYLENE, [n]
ISOBUTYLENE, an isomer of butylene used in the manufacture of synthetic rubber [n]
ISOBUTYLENE, [n]
ISOBUTYLENE, an isomer of butylene used in the manufacture of synthetic rubber [n]