2 2 4 6 7 July 8, 2019 16 32 64 128 2 2 4 6 7 pentamethyldihydrobenzofuran 5 sulfonyl 2 2 4 6 7 pentamethyldihydrobenzofuran 5 sulfonyl chloride 2 2 4 5 6 7 2 2 3 4 6 7 2 4 6 7 8 2 4 6 7 8 9 2 4 6 7 9 2 4 6 7 1 9 2 4 6 7 1 2 2 6 x 3 4 7 2 4 6 7 as a fraction 2 4 6 7 10 2 4 6 7 slope 2 4 6 7 12
