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In the literature, I have read the term, "ynoate" refer to a sort of alkyne. Searching through the IUPAC gold book and Google has failed to return an explicit definition.
ynoate refers to a derivative of an alkyne acid. e.g. ethyl-3-butynoate structure here
The simplest of these is propiolic acid https://en.wikipedia.org/wiki/Propiolic_acid
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