2-(6'-Methyl-8'-oxo-4',8'-dihydro-3'H-spiro[cyclohexane-1,2'-pyrano[3,2-g]chromen]-7'-yl)acetic acid 1g

2-(6'-Methyl-8'-oxo-4',8'-dihydro-3'H-spiro[cyclohexane-1,2'-pyrano[3,2-g]chromen]-7'-yl)acetic acid 1g