Antifungal and Antibacterial Metabolites from a French Poplar Type Propolis

Figure 4

Structures of 8-[(E)-phenylprop-2-en-1-one]-(2R,3S)-5-methoxycatechin (40a) and 8-[(E)-phenylprop-2-en-1-one]-(2S,3R)-5-methoxycatechin (40b) and a similar pair of racemates isolated by Sha et al. 2009 [26].