1 N88 (1r,4r,5r)-3-(tert-butylcarbamoyl)-1,4,5-trihydroxycyclohex-2-ene-1-carboxylic acid 1.000 2 48P (1r,4r,5r)-1,4,5-trihydroxy-3-hydroxymethylcyclohex-2-ene-1-carboxylic acid 0.737