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- From an avoided double redirect: This is a redirect from an alternative title or related topic of Hajos–Parrish–Eder–Sauer–Wiechert reaction, another redirect to the same title. Because double redirects are disallowed, both pages currently point to Proline-catalyzed aldol reactions.
- If Hajos–Parrish–Eder–Sauer–Wiechert reaction is retargeted or is expanded into a separate article, template, or other project page, this redirect will be recategorized to be updated.