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Ginsenoside Rb2 - Revision history
2026-06-15T07:24:17Z
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Toyama: New page: {{Hierarchy|{{PAGENAME}}}} {{Metabolite |SysName=(3beta,12beta)-20-[(6-O-alpha-L-Arabinopyranosyl-beta-D-glucopyranosyl)oxy]-12-hydroxydammar-24-en-3-yl 2-O-beta-D-glucopyranosyl-beta-D-g...
2010-02-16T01:02:42Z
<p>New page: {{Hierarchy|{{PAGENAME}}}} {{Metabolite |SysName=(3beta,12beta)-20-[(6-O-alpha-L-Arabinopyranosyl-beta-D-glucopyranosyl)oxy]-12-hydroxydammar-24-en-3-yl 2-O-beta-D-glucopyranosyl-beta-D-g...</p>
<p><b>New page</b></p><div>{{Hierarchy|{{PAGENAME}}}}<br />
<br />
{{Metabolite<br />
|SysName=(3beta,12beta)-20-[(6-O-alpha-L-Arabinopyranosyl-beta-D-glucopyranosyl)oxy]-12-hydroxydammar-24-en-3-yl 2-O-beta-D-glucopyranosyl-beta-D-glucopyranoside<br />
|Common Name=&&Ginsenoside Rb2&&Dammarane beta-D-glucopyranoside deriv.&&Ginsenoside C&&<br />
|CAS=11021-13-9<br />
|KNApSAcK=<br />
}}<br />
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==Spectroscopic Data==<br />
<br />
{| class="wikitable" style="width:80%"<br />
'''Free acid'''<br />
|-<br />
| '''M.P.'''<sup>1</sup> || 200 - 203 °C <br />
|-<br />
| '''IR''' (KBr)<sup>1</sup>|| 3400 (OH), 1620 (C=C) cm<sup>-1</sup><br />
|-<br />
| '''<sup>13</sup>C-NMR''' (C<sub>5</sub>D<sub>5</sub>N, 25.15MHz)<sup>2</sup>|| C-1) 39.4, (2) 26.6, (3) 89.1, (4) 39.6, (5) 56.4, (6) 18.3, (7) 35.1, (8) 39.9, (9) 50.1, (10) 36.8, (11) 30.7, (12) 70.1, (13) 49.4, (14) 51.3, (15) 30.7, (16) 26.4, (17) 51.6, (18) 16.2, (19) 15.9, (20) 83.5, (21) 22.2, (22) 36.3, (23) 23.1, (24) 125.8, (25) 131.0, (26) 25.8, (27) 17.9, (28) 28.0, (29) 16.5, (30) 17.3 '''Glc I''' (1) 105.0, (2) 83.0, (3) 78.1, (4) 71.5, (5) 78.1, (6) 62.7 '''Glc II''' (1) 105.7, (2) 76.9, (3) 79.0, (4) 71.5, (5) 78.7, (6) 62.7 '''Glc III''' (1) 97.9, (2) 74.8, (3) 78.7, (4) 71.5, (5) 76.6, (6) 69.0 '''Ara''' (1) 104.5, (2) 72.0, (3) 73.9, (4) 68.5, (5) 65.5 <br />
|}<br />
'''Permethyl ester'''<br />
{| class="wikitable" style="width:80%"<br />
|-<br />
| '''<sup>1</sup>H-NMR''' (C<sub>5</sub>D<sub>5</sub>N, 100 MHz)<sup>1</sup>|| 0.79-0.98 (5xCH<sub>3</sub>), 1.28 (s, CH<sub>3</sub>), 1.51 (s, CH<sub>3</sub>), 1.65 (s, CH<sub>3</sub>), 3.31-3.60 (s, 13xOCH<sub>3</sub>), 4.23, 4.30, 4.40, 4.65 (each d, each ''J''=7.0 Hz, 4 x anomeric H)<br />
|}<br />
<small>) S. Shibata et al., Chem.Pharm.Bull., 22, 421 (1974)., 2) T. Fuwa et al., Chem.Pharm.Bull., 31, 2120 (1983).</small></div>
Toyama