Isolation of 2,6-Dimethoxy 1,4-Benzoquinone from Hydrangea (Hydrangea macrophyllaSeringe var.otaksaMakino) and Its Deodorant Activity against Methyl Mercaptan

Hydrangea

Chemical constituents from the Hydrangea chinensis.

Two quinazolone alkaloids, (+)-febrifugine (1) and isofebrifugine (2), along with three coumarin derivatives, 6-hydroxy coumarin (3), skimmin (5), and umbelliferone-7-O-alpha-L-rhamnopyranosyl(1-->4)-beta-D-glucopyranoside (6), were isolated from the roots of Hydrangea chinensis. Compound 6 is a new compound. In addition, umbelliferone (4), linoleic acid (7), two steroidal glycosides (8, 9), th...

against Methyl Mercaptan

The deodorizing mechanism of (-)-epigallocatechin gallate (ECCg), the main constituent of a green tea extract, against methyl mercaptan (CH,SH) was investigated. EGCg showed deodorizing activity against CH3SH by a chemica] reaction between EGCg and CH3SH. The non-volatile reaction products were identified to be compounds introducing a methylthio andlor a methylsulfinyl group into the B ring of ...

Two new cyanogenic glucosides from the leaves of Hydrangea macrophylla.

Chemical investigation of the ethanol extract of the aerial parts of Hydrangea macrophylla collected in the Sichuan Province of China resulted in the isolation of two new cyanogenic glucosides. Their structures were elucidated as [(2R)-2-β-D-glucopyranosyloxy)-2-(3,4-dimethoxy-phenyl)] acetonitrile (1) and {(2R)-2-[α-D-glucopyranosyl(1-->6)β-D-glucopyranosyloxy]-2-(3-hydroxy-4-methoxy-phenyl)}a...

Identification of aluminum species in an aluminum-accumulating plant, hydrangea (Hydrangea macrophylla), by electrospray ionization mass spectrometry.

The use of electrospray ionization mass spectrometry (ESI-MS) in negative ion mode was investigated as a direct probe for identifying Al species in Al-accumulating hydrangea (Hydrangea macrophylla) samples. Cell sap solutions of hydrangea leaves were purified using Sephadex G-10 liquid chromatography and each fraction was analyzed using ESI-MS and ESI-MS/MS to identify Al species. In hydrangea ...