prov:value
| - A possible radical R31 is ???CN or COOR32, it being possible for R32 to be hydrogen, alkyl or aryl, advantageously hydrogen or alkyl, preferably hydrogen, methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, s-butyl or t-butyl, especially hydrogen, methyl or ethyl and particularly preferably hydrogen or methyl.
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