Fig. 5　a) SPLS-1 scheme, b) SPLS-2 scheme and c) SPLS-3 scheme. 1) 2-azidoethyl B-N-acetyl-galactosamine, dry pyridine; 2) PPh3, dry CH2Cl2; 3) 10% H2O/THF; 4) succinic anhydride, DIEA, DMF; 5) H-glu(O-dodecyl)2, DPPA, DIEA, DMF; 6) 2% TFA/CH2Cl2; 7) H-glu(O-allyl)2, DPPA, DIEA, DMF; 8) Pd2(OAc)2, PPh3, morpholine, THF; 9) n-hexanol, HOBt, DMAP, DIC, DMF.

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