Pyrazolotriazole derivatives

A pharmaceutical composition containing as the active ingredient a pyrazoiotriazole derivative represented by the general formula:

• ##STR169## wherein each symbol means as follows;
• R.sup.1, R.sup.3 and R.sup.4 :
• one of them represents a hydrogen atom, a biphenylmethyl group having a tetrazolyl group which may be substituted by aralkyl, or a lower alkyl group, and each of the remaining two has no substituent,
• R.sup.2 :
• a hydrogen atom, a biphenylmethyl group having a tetrazolyl group which may be substituted by aralkyl, a cycloalkyl group, or a lower alkyl group which may be substituted by hydroxyl group, lower alkoxy, carboxyl or lower alkoxycarbonyl, and
• R.sup.5 and R.sup.6 :
• these may be the same or different from each other, and each represents a hydrogen atom, a halogen atom, a biphenylmethyl group having a tetrazolyl group which may be substituted by aralkyl, a formyl group, a carboxyl group, an esterified carboxyl group, a cycloalkyl group, a lower alkoxy group, a lower alkoxycarbonyl group, or a lower alkyl group which may be substituted by hydroxyl, formyl, carboxyl, lower alkoxy or lower alkoxycarbonyl, provided that at least one of R.sup.1 to R.sup.6 is a biphenylmethyl group having a tetrazolyl group which may be substituted by aralkyl, and the broken lines mean that the pyrazolotriazole ring forms three double bonds, or a pharmaceutically acceptable salt thereof.