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Figure 4
Supposed photochemical preparation of a cyclo­butadiene from α-pyrone. (Reproduced with permission of Wiley and the Deutsche Chemische Gesellschaft.)

Journal logoSTRUCTURAL
CHEMISTRY
ISSN: 2053-2296
Volume 79| Part 11| November 2023| Pages 445-455
https://doi.org/10.1107/S2053229623007088
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