Complex sentence: Esters with the general formula "R 1" SO 2 O "R 2" are as a category called "sulfonic esters", with individual members of the category being named analogously to how ordinary carboxyl esters are named.
Split into simpler sentences: Esters with the general formula "R 1" SO 2 O "R 2" are as a category called "sulfonic esters". Individual members of the category are named analogously to how ordinary carboxyl esters are named.