Ring No 1 a 3 b 9 b 1 H (mult., J in Hz) C 1 H (mult., J in Hz) C 1 H (mult., J in Hz) Compound 2 was identified by comparing its C NMR data (Table , Figure ) and ECD (Figure ) with reported data. However, based on the analysis of its 2D NMR data, the assignments of several carbon atoms in 2 9 should be revised as indicated.