1200 lc ms

The organic reagents used were pure commercial products from Aladdin. The solvents were purchased from Chengdu Kelong Chemical Reagents Co. Anhydrous CH₂Cl₂ was distilled prior to use. The 300–400 mesh silica gels was purchased from Qingdao Hailang Chemical Reagents Co. ¹H NMR and ¹³C NMR spectra were recorded on Bruker Avance 300, Avance 400, or Avance 600 spectrometer. The FTIR spectra were obtained from Nicolet 380 FTIR spectrophotometer (Thermo Fisher Nicolet, USA) with a resolution of 4 cm⁻¹ from 400 cm⁻¹ to 4000 cm⁻¹. UV-vis spectrophotometer (Thermo Scientific Evolution 201, USA) used had a double-beam light source from 190 nm to 1100 nm. Mass spectral analysis was conducted using Varian 1200 LC/MS.

The organic reagents used were pure commercial products from Aladdin. The solvents were purchased from Chengdu Kelong Chemical Reagents Co. (Sichuan, China). Anhydrous CH₂Cl₂ was distilled prior to use. The 300–400 mesh silica gel was purchased from Qingdao Hailang. The ¹H-NMR, ¹³C-NMR spectra were recorded on Bruker Avance 300, Avance 400, or Avance 600 spectrometer (Carlsruhe, Germany). The FTIR spectra were obtained from Nicolet 380 FTIR spectrophotometer (Thermo Fisher Nicolet, Madison, WI, USA) with a resolution of 4 cm⁻¹ from 400 cm⁻¹ to 4000 cm⁻¹. UV-vis spectrophotometer (Thermo Scientific Evolution 201, Waltham, MA, USA) used had a double-beam light source from 190 nm to 1100 nm. Mass spectral analysis was conducted using Varian 1200 LC/MS (Palo Alto, CA, USA).

The organic reagents used were pure commercial products from Aladdin. The solvents were purchased from Chengdu Kelong Chemical Reagents Co. The 300–400 mesh silica gels were purchased from Qingdao Hailang Chemical Reagents Co. ¹H NMR and ¹³C NMR spectra were recorded on a Bruker Avance III 600 MHz, CDCl₃ and CD₃OD were used as the solvents, tetramathylsilane as the internal standard. The FTIR spectra were obtained from a Nicolet 380 FTIR spectrophotometer (Thermo Fisher Nicolet, USA) with a resolution of 4 cm⁻¹ from 400 cm⁻¹ to 4000 cm⁻¹. The ultraviolet (UV)–vis spectrophotometer (Thermo Scientific Evolution 201, USA) used had a double-beam light source from 190to 1100 nm. Mass spectral analysis was conducted using a Varian 1200 LC/MS.