Propionic Acid → 1-Methyl-4-[2-(trifluoromethyl)-9H-xanthen-9-ylidene]piperidine

Reaction equation

[CH3:1][N:2]1[CH2:7][CH2:6][CH:5]([C:8]2(O)[C:21]3[CH:20]=[C:19]([C:22]([F:25])([F:24])[F:23])[CH:18]=[CH:17][C:16]=3[O:15][C:14]3[C:9]2=[CH:10][CH:11]=[CH:12][CH:13]=3)[CH2:4][CH2:3]1.S(C1C=CC=CC=1C(OC(=O)C1C=CC=CC=1S(O)(=O)=O)=O)(O)(=O)=O.C(O)(=O)CC.[OH-].[Na+]>O>[CH3:1][N:2]1[CH2:3][CH2:4][C:5](=[C:8]2[C:21]3[CH:20]=[C:19]([C:22]([F:25])([F:23])[F:24])[CH:18]=[CH:17][C:16]=3[O:15][C:14]3[C:9]2=[CH:10][CH:11]=[CH:12][CH:13]=3)[CH2:6][CH2:7]1