Supplementary material for: 'Optimisation of isolation procedure for pyrrolizidine alkaloids from Rindera umbellata Bunge'

Experimental details relating to the article: Mandić, B., Vlajic, M. D., Trifunović, S., Simić, M. R., Vujisić, L. V., Vučković, I., Novaković, M., Nikolic-Mandic, S. D., Tešević, V., Vajs, V.,& Milosavljević, S. (2015). Optimisation of isolation procedure for pyrrolizidine alkaloids from Rindera umbellata Bunge. Natural Product Research, 29(9), 887-890. https://doi.org/10.1080/14786419.2014.991929. Figure S1. Structures of monitored PAs from R. umbellata (1 - 6). Figure S2. Yields of PAs in relation to days of maceration in the methanol. Figure S3. Yields of PAs extracted with methanol, ethanol and sulphuric acid during four days at dark place and room temperature. Figure S4. Yields of PAs (1-6) in relation to molarity of sulphuric acid used for their extraction. Figure S5. Yields of PAs (1-6) in relation to days of maceration with 1 M sulphuric acid, at room temperature. Figure S6. Yields of PAs (1-6) in relation to days of ultrasonic assisted extraction with 1 M sulphuric acid. Figure S7. Yields of PAs (1-6) in relation to days of extraction with 1 M sulphuric acid by overhead rotary mixer. Figure S8. Comparison of yields of PAs (1-6) accomplished after four days of maceration, three days of extraction by ultrasonic bath and overhead rotary mixer assisted extractions of plant material with 1M sulphuric acid. Figure S9. Yields of PAs (1-6) isolated from 1.00 g of the plant material (with 1M sulphuric acid during the extraction by overhead rotary mixer for three days) in relation to the volume (ml) of sulphuric acid. Figure S10. Yields of isolated PAs (1-6) in relation to pH values of aqueous solutions for alkaline extraction of PAs with CH2Cl2. Figure S11. Yields of isolated PAs in relation to the number of continuous alkaline re-extractions with CH2Cl2 at pH 9.