Fundamental studies on the feasibility of deep eutectic solvents for the
selective partition of glaucarubinone present in the roots of Simarouba
glauca
Faisal Kholiya, Nidhi Bhatt, Meena R Rathod, Ramavatar Meena and Kamalesh Prasad *
CSIR-Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364002
(Gujarat), India. Email: kamlesh@csmcri.org; drkamaleshp@gmail.com; Phone No.: +91278-2567760. Fax: +91-278-2567562.
Details of extraction of glaucarubinone using conventional solvent extraction method
The active extract i.e., the alcohol: water 95:05 extract of root, which yielded 08-11% on
basis of dry material, was fractionated on Automated Combi Flash Separation System into 6
fractions. The first fraction (F1) was obtained through extraction with neat hexane, the
residue was subjected to extract with neat chloroform to yield the second fraction (F2),
residue was then subjected to extract with 90:10 chloroform: methanol to yield a third
fraction (F3), residue was then subjected to extract with 1:1 chloroform: methanol to yield a
fourth fraction (F4), the residue was then extracted with neat methanol to yield a fifth fraction
(F5) and the residue was then treated with pure water to obtain a sixth fraction (F6) after
filtration. Yields of F1, F2, F3, F4, F5 and F6 were 6%, 15%, 3%, 56%, 16% and 1%
respectively with 3.0% process loss.
The summary of the extraction is depicted below
1
Experimental section :
Conventional solvent extraction method employed to extract glaucarubinone was described in
the experimrntal section of the main text (Scheme 1). For fractionation of crtude Automated
Combi Flash Separation System (Isco, UA-6 ). Semi preparative HPLC system (Shimadzu ,
LC 8A) was used to purify the individual components of the fractions. For the purpose RP-18
column (250 x 21.20 mm, 10µ micro, Desc.: Luna 10µ C18(2)) was used as stationary phase
with 59:41 methanol: water as mobile phase under isocratic conditions. The detection
wavelength was 220 nm with flow rate 9.00 ml/min and run period of 30 min was maintained
throughout the experiments. Each injection contained about 13-15 mg of the sub-fractions.
The flow chart of extraction is depicted below.
Figure S1 : 1H NMR spectra for glaucarubinone (in CDCl3) extracted using conventional
solvent extraction method.
2
Figure S2 : HPLC profile for pure glaucarubinone dissolved in water.
Figure S3 : HPLC profile for pure glaucarubinone dissolved in Chol.Cl-Urea 1:2.
3
Figure S4 : HPLC profile of only Chol.Cl-Urea 1:2 diluted with water (1: 10).
Figure S5 : HPLC profile for glaucarubinone rich extract in Chol.Cl-Urea 1:2.
4
Figure S6 : ESI-MS spectra of pure glaucarubinone extracted from Simaruba glauca
employing conventional solvent extraction method.
Figure S7: ESI-MS/MS spectra of pure glaucarubinone extracted from Simaruba glauca
employing conventional solvent extraction method at m/z of 495.32.
5
Figure S8 : ESI-MS spectra for Chol.Cl-Urea 1:2 extract of glaucarubinone rich extract of
Simarouba glauca.
Figure S9 : ESI-MS/MS spectra for Chol.Cl-Urea 1:2 extract of glaucarubinone rich extract
of Simarouba glauca fragmented at m/z of 495.46.
6