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D 3131 (OTTO) 3,4-Dimethoxybenzyl alcohol, 96% Cas 93-03-8 - used as the fuel of the microbial fuel cell (MFC) to generate power. D 3131 (OTTO) 3,4-Dimethoxybenzyl alcohol, 96% Cas 93-03-8 - used in host-guest chemistry.