139231-67-7
2-hydroxy-2-(triphenylphosphoranylidene)methoxycarbonyl-5-phenyl-2,3-dihydro-2,3-furanone
→
~99%
142273-50-5
methyl 2-(3-oxo-5-phenylfuran-2-ylidene)acetate
55991-67-8
5-phenylfuran-2,3-dione