1 JPS (4r,6r,7s)-2-(2-cyclopropylethyl)-4,6,7-trihydroxy-4,5,6,7-tetrahydro-1-benzothiophene-4-carboxylic acid 1.000 2 XD9 (4r,6r,7s)-4,6,7-trihydroxy-2-[(1e)-prop-1-en-1-yl]-4,5,6,7-tetrahydro-1-benzothiophene-4-carboxylic acid 0.810