Fig. 3 in Derrisrobustones A-D, isoflavones from the twig extract of Derris robusta (DC.) Benth. and their α-glucosidase inhibitory activity

Fig. 3. ECD spectra of compounds 1–3. (A) Experimental and TDDFT calculated ECD spectra of (+)-(2′′S)-derrisrobustone A and ()-(2′′R)-derrisrobustone A at B3LYP/6311++G(d,p) level in MeOH (CPCM). (B) Experimental ECD spectra of (+)-(1′′R,2′′R)-derrisrobustone B and ()-(1′′S,2′′S)-derrisrobustone B at B3LYP/ 6311++G(d,p) level in MeOH (CPCM). (C) Experimental and TDDFT calculated ECD spectra of (+)-(1′′S,2′′R)-derrisrobustone C and ()-(1′′R,2′′S)-derrisrobustone C.