(+/-)-7,8-dihydro-6,6-dimethyl-7-hydroxy-8-amino-6H-pyrano[2,3-f]benz-2,1-3-oxadiazole 、
(5S)-(5-tert-butyldimethylsilyloxymethyl)furan-2(5H)-one 以1.68 g (54%)的产率得到7,8-dihydro-6,6-dimethyl-7-hydroxy-8-(n-(1-oxo-4-(S)-hydroxy-5-t-butyldimethylsilyloxy)-pentyl)amino-6H-pyrano[2,3-f]benzo-2,1,3-oxadiazole