1

吡

bǐ

used as phonetic bi- or pi-

2

喹

kuí

used in 喹啉 kuílín

=3

酮

tóng

ketone

=3

酮

dòng

(obsolete on its own in Standard Chinese, of alcohol, vinegar) to spoil; to go bad to spoil; to go bad

=3

酮

chóng

(obsolete on its own in Standard Chinese, of alcohol) to become sour to become sour