这就奇怪了，核黄素就是vb2

https://baike.baidu.com/item/%E7%BB%B4%E7%94%9F%E7%B4%A0B2/2625885#:~:text=%E7%BB%B4%E7%94%9F%E7%B4%A0B2%EF%BC%8C%E5%8F%88%E5%8F%AB%E6%A0%B8,%E4%BA%8E%E4%B8%8A%E8%BF%B0%E7%96%BE%E7%97%85%E7%9A%84%E9%98%B2%E6%B2%BB%E3%80%82