Bis(1-cyanovinyl acetate) Is a Linear Precursor to 3-Oxidopyrylium Ions.
Wilkerson-Hill, Sidney Malik; Sawano, Shota; Sarpong, Richmond; The Journal of organic chemistry 81 (2016) 11132–11144; doi:10.1021/acs.joc.6b02111

data_4037386
_publ_section_title
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 Bis(1-cyanovinyl acetate) Is a Linear Precursor to 3-Oxidopyrylium Ions.
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_journal_issue                   22
_journal_name_full               'The Journal of organic chemistry'
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_journal_page_last               11144
_journal_paper_doi               10.1021/acs.joc.6b02111
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'w=1/[\s^2^(Fo^2^)+(0.0755P)^2^+1.7561P] where P=(Fo^2^+2Fc^2^)/3'
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