The reaction mixture is now steam distilled, the mesitylene separated, dried over calcium chloride and fractionated; the portion which boils at 163-167'0 is collected.
"Organic-Syntheses"
Conant, James Bryant
After a few other preliminary experiments, it became evident that the original material was a complex mixture of substances and that it would have to be fractionated by some means and the fractions studied separately.
"Some Constituents of the Poison Ivy Plant: (Rhus Toxicodendron)"
William Anderson Syme