IMPPAT Phytochemical information: 
8H-1,3-Dioxolo[4,5-h][1]benzopyran-8-one

8H-1,3-Dioxolo[4,5-h][1]benzopyran-8-one
Patents
S. No.Patent identifier
1US6831199B1
2EP0850221A1
3US6028223A
4WO1997008145A1