国产av毛片1区2区3区_亚洲国产欧美日韩第一香蕉_在线免费观看亚洲_人与动另类2o2o欧美_人妻巨大乳挤奶水HD免费看_日韩专区在线播放_少妇爆乳无码专区网站冫_国产在线午夜宅男_亚洲中文字幕国产精品乱码_特级毛片爽www免费

『Molecular formula』: C₄H₅N₃O₂
『Molecular weight』: 127.11
『Features』: white or light yellow crystal powder. It is used to produce medical material intermediate.
『Packing』: 25KG/brown paper bag, 25KG/weaving bag,250KG/weaving bag