1 PQH 2-methyl-5-(trifluoromethyl)-1~{H}-pyrrole-3-carboxylic acid 1.000 2 ZO1 3-(trifluoromethyl)benzaldehyde 0.733 3 DS7 1,2,5-trimethyl-1h-pyrrole-3-carboxylic acid 0.714