of the invention moreover certain theories are proposed and disclosed herein however in no way they whether they are right or wrong should limit the scope of the invention so long as the invention is practiced according to the invention without regard for any particular theory or scheme of action the synthetic method and physicochemical properties of the compounds of the present invention are described below referring to the number of compounds in the process of synthesis see the reaction schemes as shown in fig1 fig5 the other abbreviations have the same meanings as those in the schemes shown above the routes show specifically the process for preparing the compound c34 a13 a14 a15 a16 a18 a19 a20 a21 and the compounds according to the present invention1 can also be synthesized in accordance with this process to the solution of sodium azide 64 3 g 989 mmol in 250 ml water was added dichloromethane 350 ml the biphasic mixture was cooled to 5 u00b0 c in an ice bath and triflic anhydride 47 5 ml 283 mmol was added over a 20 min period keeping the temperature under 10 u00b0 c after stirring for 2 5 h in an ice bath the reaction mixture was quenched with 70 ml sat k 2 co 3 the organic phase was isolated and the aqueous phase was extracted with ch 2 cl 2 200 ml the organic phases were combined to afford triflyl azide solution in dichloromethane caution triflyl azide is explosive needed to be stored with solvent to a solution of cupric sulfate 0 35 g 1 4 mmol in water 150 ml was added phytosphingosine hydrochloride highly pure form of phytosphingosine hydrochloride 2s 3s 4r 2 amino 1 3 4 octadecanetriol from the appropriate yeast fermentation broth is commercial.