PROBLEM TO BE SOLVED: To provide an easily synthesizable compound having a structure simpler than KODA and FNs, and activities for singly inducing flower bud formation, and to provide a flower bud formation-inducing agent.SOLUTION: The new oxylipin compound is represented by formula (I) or (II). The flower bud formation-inducing agent contains at least one thereof as an active ingredient.COPYRIGHT: (C)2012,JPO&INPIT【課題】KODA、FNsよりも構造が単純で合成しやすく、単独で花芽形成誘導活性を有する化合物及び花芽形成誘導剤を提供する。【解決手段】下記式(I)又は(II)で示される新規オキシリピン化合物と、これらの少なくとも一方を有効成分とする花芽形成誘導剤。【選択図】図6