We the Editor, authors and Publisher have retracted the following article:
Jianping Hu, Shiping Liu, Ying Long, Ning Tao, Bo Yang & Liyong Zhang (2021) Ptercresions A-C: a new terpene glycoside and two sesquiterpenes with hepatoprotective activity from Pteris cretica L, Natural Product Research, DOI: 10.1080/14786419.2021.1941949
The above article has been retracted because on reanalysing the compounds the authors believe that the structure identification of compound 2 is wrong. Upon realising this error, the authors brought the issue to the journal Editor and Publisher.
We have been informed in our decision-making by our policy on publishing ethics and integrity and the COPE guidelines on retractions.
The retracted article will remain online to maintain the scholarly record, but it will be digitally watermarked on each page as “Retracted”.