(+/-)-7,8-dihydro-6,6-dimethyl-7-hydroxy-8-amino-6H-pyrano[2,3-f]benz-2,1-3-oxadiazole 、
(+/-)β-t-butyldimethylsilyloxy-δ-valerolactone 以600 mg (38%)的产率得到7,8-dihydro-6,6-dimethyl-7-hydroxy-8-(n-(1-oxo-3-t-butyldimethylsilyloxy-5-hydroxy)pentyl)amino-6H-pyrano[2,3-f]benzo-2,1,3-oxadiazole