/-{-{dīngsuān}-}-/, /tɪŋ⁵⁵ syːn⁵⁵/, /ding1 syn1/, /ding1 syun1/, /ding1 xun1/, /dingsuan/, /dingsuan/、/ㄉㄧㄥ ㄙㄨㄢ/

1. smörsyra
2. butansyra