/-{-{nígǔdīng}-}-/, /nei̯²¹ kuː³⁵ tɪŋ⁵⁵/, /nĩ²⁴⁻²² kɔ⁵³⁻⁴⁴ ti̯ɪŋ⁴⁴/, /nei4 gu2 ding1/, /nei4 gu2 ding1/, /niguuding/, /néi4 gu2 ding1/, /nígǔding/、/ㄋㄧˊ ㄍㄨˇ ㄉㄧㄥ/
菸草中主要生物鹼