Sigma-Aldrich
Diethyl Acetylenedicarboxylate
乙炔二甲酸二乙酯
4,7,13,16,21-Pentaoxa-1,10-diazabicyclo[8.8.5]tricosane
4,7,13,16,21-五氧杂-1,10-二氮杂二环[8.8.5]廿三烷
Rhein
大黄酸
Duran?Erlenmeyer narrow-neck flasks
Duran?Erlenmeyer wide-neck flask
Duran?filtering flask
Duran?graduated laboratory bottles, without caps
Duran?带刻度的实验室瓶,无盖
Duroplan petri dishes
Easy-Read?thermometer
Kimax?centrifuge tube
Kimax?离心管
Molymod?Atoms and Bonds
Molymod?molecular model set
Molymod?分子模型组合