Laboratory of Phytochemistry, Kunming Institute of Botany, Kunming 650204, Yunnan, PR China.
Abstract:
Five caffeoylquinic acids and esters (1-5), including a new compound, 3,5-dicaffeoylquinic acid butyl ester (5), were isolated from the flowers and buds of Lonicera japonica and their structures were determined by NMR spectral analysis.