Ester sī chi̍t chióng iú-ki hòa-ha̍p-bu̍t, kóng-hòan chûn-chāi tī chū-jiân-kài, pí-jû phêng-kó ê kiat-chhó-sng pentyl, ông-lâi ê lo̍k-sng ethyl kah keng-chio ê chhò·-sng isoamyl téng. Ím-liāu, thn̂g-á kah ko-á téng éng-éng sú-iōng ester hiuⁿ-liāu.

An ester of carboxylic acid. R stands for any group (organic or inorganic, typically hydrogen or organyl) and R′ stands for organyl group.

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Wikiquote ū Ester ê ín-iōng-kù.