“…A lanostane tripterpenoid skeleton was deduced for 1 based on the above NMR data ( Table 1). The 1 H, 1 H-COSY correlations of CH 2 (1)/ CH 2 (2), H-C(5)/CH 2 (6)/H-C (7), H-C(15)/CH 2 (16)/H-C (17) and CH 2 (22)/CH 2 (23) together with the key HMBCs from Me (18) to C(12), C(13), C (14), and C(17), from Me (19) to C(1), C(5), C(9), and C(10), from Me(26) to C(3), C(4), C(5), and C(25), from Me(25) to C(3), C(4), C(5), from H-C(5) to C(3), C(7), C(25), and C(26), from H-C (7) to C(5), C(6), C(8), and C(9), from CH 2 (12) to C(9), C(11), C(13), C(14), C(17), and C(18), from CH 2 (21) to C(17), C (20), and C (22), as well as from CH 2 (22) to C(23) and C(24) confirmed the planar structure of 1 ( Figure 2). The relative configuration of 1 was determined by ROESY experiments.…”