Variable
benzene
n-hexane
isoprene
o-xylene
ethyne
propyne
n-butane
1-3-butadiene
2-methylpropane
ethylbenzene
propane
2-methylpentane
n-pentane
toluene
propene
ethene
2-methylbutane
ethane
m-p-xylene
2-methylhexane