Two New Phenylalkanoids from the Rhizomes of Zingiber officinale

Two new phenylalkanoids, 5-hydroxy-1-(4′,5′-dihydroxy-3′-methoxyphenyl)dodecan-3-one (1) and 1-(4′,5′-dihydroxy-3′-methoxyphenyl)dodec-4-en-3-one (2), were isolated from the rhizomes of Chinese ginger (Zingiber officinale Roscoe (Zingiberaceae)). The structures of the two new phenylalkanoids were elucidated by chemical and physical evidence.