(2R,3R)-2-(3,4-Dihydroxyphenyl)chroman-3,5,7-triol CAS No.490-46-0 / Cat No.EBD2184991
2-(3,4-dihydroxyphenyl)-2,3,4-trihydro-3,5,7-trihydroxychromene
L-Epicatechin
(2R,3R)-2-(3,4-Dihydroxyphenyl)chroman-3,5,7-triol
Properties
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Appearance:
White to light yellow crystal powder
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Density:
1.593g/cm3
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Melting point:
240 °C (dec.)(lit.)
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Boiling point:
630.4 °C at 760 mmHg
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Flashing point:
335°C
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Storage temperature:
2-8°C
Safety Information
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Symbol:
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Signal words:
Warning -
Hazard statements:
H315 Causes skin irritation.
H319 Causes serious eye irritation.
H335 May cause respiratory irritation.
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Precautionary statements:
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
NMR Spectrum
Prediction： 1HNMR: 6 ppm. (DMSO-d6) 9.083 (1H, s, OH), 8.873 (1H,s, OH), 8.777 (1H, s, OH), 8.694 (1H, s, OH), 6.876 (1H, d, J=2 Hz, H2), 6.646 (2H, s, H-5, 6), 5.876 (1H, d, J=2 Hz, H8), 5.700 (1H, d, J=2 Hz, H6), 4.718 (1H, s, OH), 4.640 (1H, d, J=4.5 Hz, H2), 3.987 (1H, d, J=4.5 Hz, H3), 2.663 (1H, dd, J=4.6, 6.3 Hz, H4b), 2.463 (1H,dd, J=4.6, 6.3 Hz, H4a)
1H NMR
13C NMR
