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Three caffeoyl derivatives of 1,3,4,5-tetrahydroxycyclohexane 1-carboxylic acid, one of them an oviposition stimulant for the zebra swallowtail butterfly, Eurytides marcellus, were isolated from Asimina triloba. The structure of the active isomer, 3-caffeoyl-muco-quinic acid, was determined by extensive NMR studies.
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Haribal et al. (1998) studied this question.
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