16-Nor-7,15-dioxodehydroabietic acid
Reference standards.
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Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to
24 months(2-8C).
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20C. Generally, these will be useable for up to two weeks. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.
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The packaging of the product may have turned upside down during transportation, resulting in the natural compounds adhering to the neck or cap of the vial. take the vial out of its packaging and gently shake to let the compounds fall to the bottom of the vial. for liquid products, centrifuge at 200-500 RPM to gather the liquid at the bottom of the vial. try to avoid loss or contamination during handling.
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Natural Product Research and Development, 2015.
Studies on the Chemical Constituents of Pine Cone of Pinus yunnanensis.[Reference:
WebLink]
METHODS AND RESULTS:
Thirteen compounds were isolated and purified from the ethanolic extracts of pine cone of by MPLC and column chromatography on silica gel,RP-18,MCI,and Sephadex LH-20.On the basis of spectroscopic analysis,the isolated compounds were identified as 16-nor-15-oxodehydroabietic acid (1), 16-Nor-7,15-dioxodehydroabietic acid (2), 7α,15-dihydroxydehydroabietic acid (3), methyl 15-hydroxy-7-oxodehydroabietate (4),imbricatolic acid (5), isokobusone (6), alternariol (7),matairesinol (8),(+)-epipinoresinol (9),taxifolin 3′-O-glucoside (10),pinosylvin (11),(Z)-3-hydroxy-5-methoxystilbene (12) and coniferaldehyde (13).
CONCLUSIONS:
All compounds were obtained from for the first time and compounds 1,2,6,7 and 9 were obtained from the genus for the first time.
