Two new triterpenoids from the stems of Euphorbia royleana .

Two new triterpenoids, namely 24-methylene-5,24-dien-19(10→9)- abeo -8 α ,9 β ,10 α -eupha-3 β -ol ( 1 ) and 24-methyl-5,23-dien-19(10→9)- abeo -8 α ,9 β ,10 α -eupha-3 β -ol ( 2 ) were isolated from the stems of Euphorbia royleana , together with three known analogs. The structures of the new compounds were elucidated by extensive 1 H NMR, 13 C NMR, HSQC, HMBC, 1 H- 1 H COSY, ROESY and HR-MS spectroscopic analyses.