2.8 | Materials
Gentamicin, sodium pyruvate, theophylline, R/S-bupivacaine, ropivacaine
were purchased from Sigma-Aldrich (Sigma-Aldrich, Missouri, USA).
R-bupivacaine and S-bupivacaine enantiomers were obtained from Astra
Zeneca® (London, UK) directly.