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4-Hydroxycinnamic acid trans-Cinnamic acid alpha-Methylcinnamic acid 2-BROMO-4,5-METHYLENEDIOXYCINNAMIC ACID trans-2,3,4-Trimethoxycinnamic acid 4,5-DIMETHOXY-2-NITROCINNAMIC ACID 3,4-(Methylenedioxy)cinnamic acid trans-2,4,5-Trimethoxycinnamic acid 3-BROMO-4-HYDROXY-5-METHOXYCINNAMIC ACID Ethyl 4-hydroxy-3-methoxycinnamate