Question: The organic compound with formula C3H8O2 is mainly used as a what that can can be formed by the nucleophilic attack of methanol on a  colorless and flammable gas with a faintly sweet odor?
Sentence (from "Ethylene oxide"): Because it is a strained ring, ethylene oxide easily participates in a number of addition reactions that result in ring-opening.
Relevant evidence: No