You could also do something like en.m.wikipedia.org/wiki/Ethylene_oxide but remove the hydrogens and then have the carbons do a triple bond to make pubchem.ncbi.nlm.nih.gov/…/Epoxy-acetylene

Considering ethylene oxide is already so unstable as fuck though due to its strained structure that it’s used as the main component in thermobaric weapons and this would be even more strained, I don’t know if that would be an improvement.