Dayecrystal A
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.
Need more advice on solubility, usage and handling? Please email to: service@chemfaces.com
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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JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH, 2009, 11(8):693-697.
Cytotoxic ent-kaurane diterpenoids from Isodon macrophyllus.[Reference:
WebLink]
METHODS AND RESULTS:
Two new ent-kaurane diterpenoids, dayecrystals D–E (1–2), together with nine known compounds, isojaponin A (3), rabdosin A (4), lushanrubescensin J (5), wikstroemioidin B (6), maoyecrystal C (7), rabdosin B (8), isodonal (9), shikokianin (10), and effusanin A (11), were isolated from the leaves of Isodon macrophyllus. The structures of the new compounds were elucidated using 1D and 2D NMR spectroscopy. The 13C-NMR spectral data of compound 4 are reported for the first time. All of the compounds were tested for their cytotoxicities against DU145 and LoVo human tumor cells.
CONCLUSIONS:
Compounds 4, 10, and 11 showed inhibitory effects on DU145 cells with IC50 values 5.90, 4.24, and 3.16 μM, and LoVo cells with IC50 values 14.20, 17.55, and 3.02 μM, respectively.
