Terpenoids from <i>Croton regelianus</i>

Abstract

Abstract Two new terpenoids, the bisnorditerpene rel ‐(5 β ,8 α ,10 α )‐8‐hydroxy‐13‐methylpodocarpa‐9(11),13‐diene‐3,12‐dione ( 1 ) and the guaiane sesquiterpene rel ‐(1 R ,4 S ,6 R ,7 S ,8a R )‐decahydro‐1‐(hydroxymethyl)‐4,9,9‐trimethyl‐4,7‐(epoxymethano)azulen‐6‐ol ( 2 ), together with seven known compounds, were isolated from Croton regelianus var. matosii. The structures of the isolated compounds were determined by HR‐ESI‐TOF and a combination of 1D‐ and 2D‐NMR experiments.