Herpetosin A, a nor-cucurbitane triterpenoid with a 5/6/6/5 ring system from Herpetospermum pedunculosum - Qianyu Chen; Yingxiong Ma; Zhaoyue Dong; Bing Xu; Guowei Wang; Xiaozhong Lan; Zhihua Liao; Min Chen (Natural Product Research, 2026)