::Rearrangements << def jasms_2002_scheme1_c_e1_aprimeprime_formaldehyde_loss(only_uniqs: true, fragment_adduct_state: :as_published)
        fragment_sets = []
        fragment = lambda do |*arr|
          #duplications and mapping
          (nmol,(cyclized_oxygen, freed_carbon, carbon_linked_to_nitrogen, carbon_linker, nitrogen)) = self.dup_molecule(arr)