has role independent continuant 1-methylcyclopropene CHEBI:132592 A member of the class of cyclopropenes that is cyclopropene in which the hydrogen at position 1 has been replaced by a methyl group. A gas at room temperture and pressure, it is a (synthetic) ethylene perception inhibitor and is used to prolong the life of cut and potted flowers, other ornamental plants, and fruit. plant growth regulator agrochemical cycloalkene cyclopropenes