File talk:Melatonin SAR structure.svg

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Is the rightmost "R" supposed be "R3"?

[edit]

Looking at the English Wikipedia article that uses this image (https://en.wikipedia.org/wiki/Melatonin_receptor_agonist#Structure-activity_relationship), there seems to be a missing "R3" here. Wyverald (talk) 10:59, 2 July 2020 (UTC)[reply]