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https://webbook.nist.gov/cgi/cbook.cgi?ID=C75752&Units=CAL&Mask=8
Methanesulfonic acid
acid
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((1S,4R)-7,7-Dimethyl-2-oxobicyclo[2.2.1]heptan-1-yl)methanesulfonic acid | RUTHIGEN
https://www.delchimica.com/shop/fm-in-da003bcf-1s-4r-77-dimethyl-2-oxobicyclo-2-2-1-heptan-1-yl-methanesulfonic-acid-39022
((1S,4R)-7,7-Dimethyl-2-oxobicyclo[2.2.1]heptan-1-yl)methanesulfonic acid | Delchimica