久久久av一区|一区二区三区免费在线观看|欧美片网站yy|韩国蝴蝶成人世界未删减版百度云,含羞草传媒mv免费观看视频 ,又粗又硬又黄又爽的视频,成人午夜视频在线播放

【Molecular formula】:  C₁₄H₁₁NO₅
【CAS NO.】:  134308-13-7

【Molecular weight】：273.241
【Introduction】：Important medical intermediate.
 

【Quality parameters】：

【Storage】：Use as soon as possible at low temperature, avoiding moisture or impurity.
【Packing】：25kg in paperboard drum or according to the users.