| http://www.w3.org/ns/prov#value | - Thus, the present invention relates to (1) a diphenoxypropane derivative (I) of the formula: ##STR2## wherein X is a halogen atom, Y is a hydrogen atom or a hydroxy group, Z is a tetrazolyl or carboxy group; (2) a method of producing a diphenoxypropane derivative (I), which comprises reacting a compound (II) of the formula: ##STR3## wherein X and Y have the same meaning as defined above, with hydr
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