Abstract
The eggplant and its relatives within the “spiny solanums” (Solanum subgenus Leptostemonum) have been shown to contain diverse and abundant caffeoylquinic acid derivatives, which have antioxidant and other biological activity with potential benefit to human health. We explored the diversity of caffeoylquinic acid derivatives in fruit extracts of Solanum viarum, an invasive species commonly known as the soda apple, which is within subgenus Leptostemonum and native to Brazil. Two new glucosylated caffeoylquinic acids, viarumacids A and B, were detected and isolated and their structures elucidated by means of spectroscopic methods including 2D NMR techniques and mass spectrometry. The compounds were tested for their antioxidant activities by ABTS and DPPH assays, and were found to have activities similar to 5-CQA.
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