Hyperforatone A, the 1,8-seco rearranged polycyclic polyprenylated acylphloroglucinol with a unique bicyclo[5.4.0]undecane core from Hypericum perforatum

Wu-Yang Liu, Xinxiang Lei, Wenji Wang, Jun‐Mian Tian, Yu-Qi Gao, Jin‐Ming Gao