The present invention provides stable compounds prepared from boronic acid and
lyophilized compounds thereof of the formula (1):
##STR1##
in which Z1 and Z2 are moieties derived from sugar. The
invention also provides methods for preparing such compounds. Lyophilizing a mixture
comprising a boronic acid compound and a moiety derived from sugar produces a stable
composition that readily releases the boronic acid compound upon reconstitution
in aqueous media.
