Broadpharm代理商-t-butyoxycarboxy

Quantitation of Cocaine, Benzoylecgonine, Ecgonine Methyl Ester, and Cocaethylene in Urine and Blood Using Gas Chromatography-Mass Spectrometry (GC-MS

under the stream of nitrogen. The residue is incubated with pentafluoropropionic acid anhydride and pentafluoropropanol to form pentafluoropropionyl derivatives of ecgonine methyl ester and benzoylecgonine. Cocaine and cocaethylene are refractory to derivatization

Phycoerythrin conjugation protocol

DMSO Dimethyl sulphoxide, anhydrous SPDP 3-(2-pyridyldithio)propionic acid N-hydroxysuccinimide ester (Sigma) SMCC Succinimidyl trans-4-(N-maleimidylmethyl)cyclohexane-1-carboxylate

Biotinylation of a Propargylated Cyclic (3′‐5′) Diguanylic Acid and of Its Mono‐6‐Thioated Analog Under “Click” Conditions

?cyanoethylthio group is effected by treatment with 2,4,6?triisopropybenzenesulfonyl chloride and triethylamine to give a 6?(2,4,6?triisopropylbenzenesulfonic acid) ester intermediate. Reaction of this key intermediate with 3?mercaptoproprionitrile