114522-87-1
3'-ethoxycarbonyl-3'-isopropyl-3,3,5,5-tetramethyl-3,5-dihydropyrazole-4-spiro-2'-thi-irane
→
~89%
107464-93-7
3,5-dihydro-3,3,5,5-tetramethyl-4-(1-ethoxycarbonyl-2-methylpropylidene)pyrazole