/-{-{dīngtóng}-}-/, /tɪŋ⁵⁵ tʰʊŋ²¹/, /ding1 tung4/, /ding1 tung4/, /dingtorng/, /dingtóng/、/ㄉㄧㄥ ㄊㄨㄥˊ/
(有機化學) 一種四個碳的酮類有機化合物，化學式CH3CH2COCH3