在线词典烟碱酸variant of 菸鹼酸|烟碱酸[yan1 jian3 suan1]英文释义variant of 菸鹼酸|烟碱酸[yan1 jian3 suan1]; niacin (vitamin B3); nicotinic acid; Pyridine-3-carboxylic acid C6H5NO2