(3E)-7-((tetrahydro-2H-pyran-2-yl)oxy)dodec-3-en-8-yn-2-one O-benzyl oxime

(9E)-11-(methoxyimino)dodec-9-en-4-yn-6-one

2-环戊烯酮

丙酮二甲腙

2-oxopentanenitrile