The Yi Beixin's method of separation and identification involves vacuum evaporation to dryness, crystallization using Et0H, and precipitation of crystalline material. The compound obtained is moncler jacken with a melting point of 230 ~ 233 ℃. HNMR (400MHz CDCl) δ: 2.02 (3H, s, a 0C0CH), 2.11 [3H, mbt scarpe milano, s, a C0CH], 4.75 (1H, m, W = 24Hz, the H- C0C0CH), 5.14 (1H, d, J = 14.5Hz, H - COC0CH), 1.70 (1H, s, l8 CH), 0.86 [3H, s, l9 CH], 1.02 (3H, d, 2l - CH), 0.90 [3H, d, 27 a CH]. EI-MS m/z: 152, moncler mont, 167, 484, Moncler Tükiye, 512, 527 (M).
We extend our gratitude to the Research Associate at the Academy of Agricultural Sciences Institute for their assistance in identifying the crude drugs using constant dimension spring analysis. Thanks also go to the Changchun Institute of Applied Chemistry, Moncler Tükiye Outlet, for conducting voltage edge magnetic resonance spectroscopy and mass spectrometry. Japan's Tokushima Bunri University College of Pharmacy assisted by providing partial edge magnetic resonance spectroscopy measurements for the sample, and the Court Central Laboratory measured the infrared spectrum on behalf of the study.