6'-EThyl-10'-hydroxy-3',4'-dihydro-8'h-spiro[cyclohexane-1,2'-pyrano[3,2-g]chromen]-8'-one 1g

6'-EThyl-10'-hydroxy-3',4'-dihydro-8'h-spiro[cyclohexane-1,2'-pyrano[3,2-g]chromen]-8'-one 1g