Read Edit View history 吡嗪 bǐqín pyrazine Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 吡嗪 · bǐqín · pyrazine 2026/03/04 吡嗪 bǐqín pyrazine pyrazine (chemistry) 吡嗪类化合物常用于制作食品香精。 created sense Mar 4, 2026, 02:25 AM