(1R,6S)-1,6-dihydroxycyclohexa-2,4-diene-1-carboxylate (1R,6S)-1,6-dihydroxy-1-cyclohexa-2,4-dienecarboxylate cis-1,6-Dihydroxy-2,4-cyclohexadiene-1-carboxylic acid c0280