Accepted Manuscript Is comfrey root more than toxic pyrrolizidine alkaloids? Salvianolic acids among antioxidant polyphenols in comfrey (Symphytum officinale L.) roots Adriana Trifan, Sebastian E.W. Opitz, Roland Josuran, Andreas Grubelnik, Nils Esslinger, Samuel Peter, Sarah Bräm, Nadja Meier, Evelyn Wolfram PII: S0278-6915(17)30799-8 DOI: 10.1016/j.fct.2017.12.051 Reference: FCT 9496 To appear in: Food and Chemical Toxicology Received Date: 3 November 2017 Revised Date: 21 December 2017 Accepted Date: 22 December 2017 Please cite this article as: Trifan, A., Opitz, S.E.W., Josuran, R., Grubelnik, A., Esslinger, N., Peter, S., Bräm, S., Meier, N., Wolfram, E., Is comfrey root more than toxic pyrrolizidine alkaloids? Salvianolic acids among antioxidant polyphenols in comfrey (Symphytum officinale L.) roots, Food and Chemical Toxicology (2018), doi: 10.1016/j.fct.2017.12.051. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.