Skip to Content
Merck

Studies of the constituents of Uruguayan propolis.

Journal of agricultural and food chemistry (2002-08-09)
Shigenori Kumazawa, Katsumi Hayashi, Katsuko Kajiya, Takeshi Ishii, Tomoko Hamasaka, Tsutomu Nakayama
ABSTRACT

Eighteen flavonoids including two new compounds, four aromatic carboxylic acids, and eleven phenolic acid esters including one new compound were isolated and identified from the ethyl acetate soluble fraction of the 70% ethanol extract of Uruguayan propolis. The new compounds were elucidated as pinobanksin 3-(2-methyl)butyrate (1; recently reported in Usia, T.; Banskota, A. H.; Tezuka, Y.; Midorikawa, K.; Matsushige, K.; Kadota, S. J. Nat. Prod. 2002, 65, 673-676) pinobanksin 3-isobutyrate (2), and 2-methyl-2-butenyl ferulate (24). The constituents isolated from Uruguayan propolis in this study were similar to those of propolis of European and Chinese origin. Thus, it is suggested that the Uruguayan propolis has a plant origin similar to those of propolis from Europe and China.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Pinobanksin, ≥95% (HPLC)