Complex sentence: The liqueur is today produced by Zwack according to a secret formula including more than 40 herbs and aged in oak casks; during the Communist regime in Hungary, Unicum was produced by a different formula.
Split into simpler sentences: The liqueur is today produced by Zwack according to a secret formula including more than 40 herbs and aged in oak casks. During the Communist regime in Hungary, Unicum was produced by a different formula.