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Note: Wildcard searching using an asterisk only works for single-search-term, single-word substance name searches (e.g., benoxa*).
Example: methyl ethyl ketone
amyloid ß, sigma bonds, interferon .alpha.
Note: For more information, see Greek Letters and Equivalents Used in Searching.
Number (with or without dashes, e.g., 51146-57-7, 51146577)
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You may enter multiple CAS RNs separated by a space, no commas or other punctuation. The search field has a 2000-character limit.
Number (e.g., 31-367-CAS-23114229)
Note: You may enter multiple CAS Reaction Numbers separated by a space or a comma or semi-colon followed by a space.
Patent Number (no spaces, e.g., US4571400)
Accession Number (e.g., 1986:230471)
PubMed ID Number (e.g., 15980585)
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FAQ: When do multi-step reactions appear in my results?
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The results are displayed on the Reactions page.
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