Not Less Than - 95%
Acetamide, (S)-N-(2'-(1-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethyl)-1,1',3,3'-tetraoxo-[2,4'-biisoindolin]-4-yl);
(S)-N-(2'-(1-(3-Ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethyl)-1,1',3,3'-tetraoxo-[2,4'-biisoindolin]-4-yl)acetamide