A new phenolic glycoside from Juglans mandshurica.

A new phenolic glycoside, 6-O-(4′-hydroxy-3′,5′-dimethoxybenzoyl)-d-glucopyranose (4), and nine known compounds (1–3 and 5–10) were isolated from Juglans mandshurica Maxim. Compound structures were elucidated by NMR, HR-ESI-MS and acid hydrolysis. Compounds 5 and 6 are reported from this genus for the first time. Among compounds 1–10, only 1 exhibited cytotoxicity against MGC-803, A549, K562, JAR, HeLa, CaSKi and SiHa cell lines (IC50: 2.0, 5.3, 2.3, 6.9, 4.0, 6.6 and 2.7 μM, respectively).