Edited sentence: formula

Cracked gasoline is stabilized against oxidant with a new type of antioxidant, prepared by cyanogenation of alkylenediamines, which has the typical formula HN.(CH2)n.N:CC:N.(CH2)n.NH, where n is 2-4.

Cyanogenation of alkylenediamines has the typical formula.

アルキレンジアミンのシアノ化には代表式がある。