8,8,10-trimethyl-4-phenyl-7,8-dihydro-2H,6H-pyrano[3,2-g]chromene-2,6-dione 6-(N-methylthiosemicarbazone) 、
乙酸酐 以52%的产率得到N-[3'-acetyl-2,2,10-trimethyl-8-oxo-6-phenyl-2,3-dihydro-3'H,8H-spiro[pyrano[3,2-g]chromene-4,2'-[1,3,4]-thiadiazol]-5'-yl]-N-methylacetamide