C2 MA Type (Maleimide PEG)

2arm branched PEG, -(CH23NHCO(CH2)2-MAL, Mw 20,000 /p>
2arm branched PEG, -(CH23NHCO(CH2)2-MAL, Mw 40,000
2arm branched PEG, -(CH23NHCO(CH2)2-MAL, Mw 60,000
2arm branched PEG, -(CH23NHCO(CH2)2-MAL, Mw 80,000