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?? ???? >（Z,E）－2－（3,4－Dihydroxyphenyl）ethenyl ester of 3－（3,4－dihydroxyphenyl）－2－propenoic acid
（Z,E）－2－（3,4－Dihydroxyphenyl）ethenyl ester of 3－（3,4－dihydroxyphenyl）－2－propenoic acid
（Z,E）－2－（3,4－Dihydroxyphenyl）ethenyl ester of 3－（3,4－dihydroxyphenyl）－2－propenoic acid ??
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（Z,E）－2－（3,4－Dihydroxyphenyl）ethenyl ester of 3－（3,4－dihydroxyphenyl）－2－propenoic acid C??? ??, ??, ??
（Z,E）－2－（3,4－Dihydroxyphenyl）ethenyl ester of 3－（3,4－dihydroxyphenyl）－2－propenoic acid ?? ?? ? ???
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（Z,E）－2－（3,4－Dihydroxyphenyl）ethenyl ester of 3－（3,4－dihydroxyphenyl）－2－propenoic acid ?? ??
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