1 9G9 5,5'-[(2r,3s)-2,3-dimethylbutane-1,4-diyl]bis(2h-1,3-benzodioxole) 1.000 2 BDS 2,3-bis-benzo[1,3]dioxol-5-ylmethyl-succinic acid 0.857 3 BYS 2-benzo[1,3]dioxol-5-ylmethyl-3-benzyl-succinic acid 0.750