Nine new methylated galloylquinic acids were isolated from an aqueous fraction of Copaifera langsdorffii (Fabaceae-Caesalpinioideae) leaf hydroalcoholic extract (3-8, 11, 12, and 14), along with three known methylated galloylquinic acids (1, 2, and 15) and four galloylquinic acids (9, 10, 13, and
Fifty-seven tannins and related compounds, including gallotannins, ellagitannins, and condensed and complex tannins, were evaluated for their cytotoxicities against human tumor cell lines, including malignant melanoma, lung carcinoma, ileocecal adenocarcinoma, epidermoid carcinoma, malignant