| http://www.w3.org/ns/prov#value | - A1-0 for which m=0 by treatment with an appropriate oxidizing agent such as H2O2, NaOCl or 3-chloro-perbenzoeic acid in analogy to syntheses described in Journal of Heterocyclic Chemistry 2005, 42, 599-607 (H2O2), Journal of Organic Chemistry 1984, 49, 2282-2284 (NaOCl) or Heterocycles 1998, 49, 181-190 (meta-chloro-perbenzoic acid (mcpba)): Compounds I-A2 in which A has the meaning given for A2 c
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