? 2021Nineteen triterpenoids including two new tirucallane ones, fisuphanins A and B, were isolated from the whole plant of Euphorbia fischeriana Steud. The new structures were elucidated on the basis of extensive spectroscopy techniques including infrared (IR), High Resolution Mass Spectrometry (HRMS), and Nuclear Magnetic Resonance (NMR). Some triterpenoids were evaluated for their cytotoxicity against A549 and MCF-7 cell lines.