| http://www.w3.org/ns/prov#value | - vention, of the process for the preparation of 7-aminocephalosporanic acid which comprises the consecutive steps of: (A) Mixing a compuond having the formula in which each M is selected from the group consisting of hydrogen, metal and amine cations, and R is (lower) alkyl, but preferably ethyl, n-propyl, isopropyl, n-butyl and isobutyl; or an aralkyl group of the formula wherein n is an integer of
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