1: Venditti A, Frezza C, Serafini M, Bianco A. Iridoids and phenylethanoid from Pedicularis kerneri Dalla Torre growing in Dolomites, Italy. Nat Prod Res. 2016;30(3):327-31. doi: 10.1080/14786419.2015.1060230. Epub 2015 Jul 24. PubMed PMID: 26207992.
2: Rana A, Rana S, Majeed R, Singh HP, Gulati A, Hamid A, Vyas D, Dhyani D. Comparative studies for screening of bioactive constituents from various parts of Incarvillea emodi. Nat Prod Res. 2014;28(8):593-6. doi: 10.1080/14786419.2014.886207. Epub 2014 Feb 19. PubMed PMID: 24547772.
3: Venditti A, Serrilli AM, Di Cecco M, Ciaschetti G, Andrisano T, Bianco A. Phytochemical analysis of Plantago sempervirens from Majella National Park. Nat Prod Res. 2012 Nov;26(21):2035-9. Epub 2011 Nov 14. PubMed PMID: 22081901.
4: Rana A, Dhyani D, Gulati A, Singh HP. Isolation of two major iridoid glucosides from Incarvillea emodi. Nat Prod Res. 2011 Jun;25(10):1014-7. doi: 10.1080/14786419.2010.523003. PubMed PMID: 21644183.
5: Yu ZW, Zhu HY, Yang XS, Sun QY, Hao XJ. [Study on chemical constituents from Incarvillea arguta and their accelerating PC-12 cell differentiation]. Zhongguo Zhong Yao Za Zhi. 2005 Sep;30(17):1335-8. Chinese. PubMed PMID: 16323541.
6: Luo Y, Yi J, Li B, Zhang G. Novel ceramides and a new glucoceramide from the roots of Incarvillea arguta. Lipids. 2004 Sep;39(9):907-13. PubMed PMID: 15669767.
7: Taskova R, Evstatieva L, Handjieva N, Popov S. Iridoid patterns of genus Plantago L. and their systematic significance. Z Naturforsch C. 2002 Jan-Feb;57(1-2):42-50. PubMed PMID: 11926542.
8: Su BN, Zhai JJ, Jia ZJ. New iridoids from Pedicularis artselaeri. J Asian Nat Prod Res. 1998;1(2):103-9. PubMed PMID: 11261210.
9: Ersöz T, Berkman MZ, Taşdemir D, Ireland CM, Caliş I. An iridoid glucoside from Euphrasia pectinata. J Nat Prod. 2000 Oct;63(10):1449-50. PubMed PMID: 11076577.
10: Zhou BN, Bahler BD, Hofmann GA, Mattern MR, Johnson RK, Kingston DG. Phenylethanoid glycosides from Digitalis purpurea and Penstemon linarioides with PKCalpha-inhibitory activity. J Nat Prod. 1998 Nov;61(11):1410-2. PubMed PMID: 9834166.
11: Ismail LD, el-Azizi MM, Khalifa TI, Stermitz FR. Verbascoside derivatives and iridoid glycosides from Penstemon crandallii. Phytochemistry. 1995 Aug;39(6):1391-3. PubMed PMID: 7669280.
12: Debrauwer L, Maillard C, Babadjamian A, Vidal-Ollivier E, Laget M, Salmona G, Afzal-Raffi Z. Study in the chemical constituents of plantago cynops L. and antibacterial evaluation of verbascoside. Pharm Acta Helv. 1989;64(7):183-7. PubMed PMID: 2762360.