This enzyme belongs to the family of isomerases, specifically the class of intramolecular lyases. The systematic name of this enzyme class is cycloeucalenol lyase (cyclopropane-decyclizing). This enzyme is also called cycloeucalenol---obtusifoliol isomerase. This enzyme participates in biosynthesis of steroids.
Heintz R, Benveniste P (1974). "Plant sterol metabolism. Enzymatic cleavage of the 9beta, 19beta-cyclopropane ring of cyclopropyl sterols in bramble tissue cultures". J. Biol. Chem. 249 (13): 4267–74. PMID4369016.