1 HMQ 2-[(6r)-6-(dioxidanyl)-6-oxidanyl-3-oxidanylidene-cyclohexa-1,4-dien-1-yl]ethanoic acid 1.000 2 HQ9 2-(6-oxidanyl-3-oxidanylidene-cyclohexa-1,4-dien-1-yl)ethanoic acid 0.857 3 OMD 2-(3,6-dihydroxyphenyl)acetic acid 0.857 4 3HP 3-hydroxyphenylacetate 0.786 5 KTA (S)-cyclohexanone-2-acetate 0.786 6 OHP (2-hydroxyphenyl)acetic acid 0.786 7 A29 2-(3-hydroxyphenyl)-2-oxo-ethanoic acid 0.733 8 DHY 2-(3,4-dihydroxyphenyl)acetic acid 0.733 9 PAC 2-phenylacetic acid 0.714