Fig. 5
From: Novel phthalide derivatives identified from Ligusticum chuanxiong (Chuanxiong)

The Δδ values of the (S)- and (R)-MTPA esters ((−)-1-a and (−)-1-b) indicating the R configuration of C-6 in (−)-1
From: Novel phthalide derivatives identified from Ligusticum chuanxiong (Chuanxiong)
The Δδ values of the (S)- and (R)-MTPA esters ((−)-1-a and (−)-1-b) indicating the R configuration of C-6 in (−)-1