2,3-Dihydro-1,4-benzodioxin-2-methanol3663-82-965 % similar 3,4-Ethylenedioxythiophene126213-50-141 % similar 2-(Bromomethyl)-1,4-benzodioxane2164-34-338 % similar 2-Aminomethyl-1,4-benzodioxane4442-59-538 % similar (±)-Mephenesin59-47-230 % similar Guaifenesin93-14-130 % similar