煙酸 yān suān

DEFINITIONS

  1. niacin (vitamin B3)
  2. 3-Pyridinecarboxylic acid C6H5NO2
  3. nicotinic acid

CHARACTERS

煙 yān smoke, soot; opium; tobacco, cigarettes
酸 suān
HSK 4
tart, sour; acid; stiff; spoiled