You know what it looks like… but what is it called?
TAKE THE QUIZguaifenesin
noun
guai·fen·e·sin
g(w)ī-ˈfen-ə-sən
: the glyceryl ether of guaiacol C10H14O4 that is used especially as an expectorant
called also glyceryl guaiacolate
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Merriam-Webster unabridged
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