What is pertaining to, or designating, an acid, C11H18O2, of the propiolic acid series, obtained indirectly from undecylenic acid as a white crystalline substance called?

undecolic — Pertaining to, or designating, an acid, C11H18O2, of the propiolic acid series, obtained indirectly from undecylenic acid as a white crystalline substance. (Webster's 1913.)

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