Phenolic derivatives from Aster indicus

4-Hydroxy-3-[1-(methoxycarbonyl)vinyloxy]benzoic acid (1), 5-(1-carboxylvinyloxy)-2-hydroxybenzoic acid (2), 4-allyl-2, 6-dimethoxyphenyl 3-methylbutanoate (3), and 4-allyl-2-methoxyphenyl 2-methylbutanoate (4) were isolated from the whole herbs of Aster indicus. Their structures were established using spectroscopic analyses.