Used for long-acting of pegylation of biopharmaceuticals. Special v¡± shape, connected by ether bond. Avoid instability caused by carbamate ester bond, also shorten the reaction period. It is one of our star products. Novel 2-arm peg -sh [novel 2-arm methoxypoly(ethylene glycol) thiol] Novel 2-arm peg -sc [novel 2-arm methoxypoly(ethylene glycol) succinimidyl ester] Novel 2-arm peg -ma [novel 2-arm methoxypoly(ethylene glycol) methacrylate] Novel 2-arm peg -mal [novel 2-arm methoxypoly(ethylene glycol) maleimide] Novel 2-arm peg -nco [novel 2-arm methoxypoly(ethylene glycol) isocyanate] Novel 2-arm peg -eo [novel 2-arm methoxypoly(ethylene glycol) glycidyl ether] Novel 2-arm peg-cooh [novel 2-arm methoxypoly(ethylene glycol) carboxylic acid] Novel 2-arm peg -nh2 [novel 2-arm methoxypoly(ethylene glycol) amine] Novel 2-arm peg -alkyne [novel 2-arm methoxypoly(ethylene glycol) alkyne] Novel 2-arm peg -aa [novel 2-arm methoxypoly(ethylene glycol) acrylate] Novel 2-arm peg -cho [novel 2-arm methoxypoly(ethylene glycol) aldehyde] Novel 2-arm peg-oh [novel 2-arm methoxypoly(ethylene glycol)]