Patent ID: 11897984
Assignee: KEMIRA OYJ
Field: Organic fine chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 9:
10. The compound of claim 7, wherein:
(i) R33, R34, R35, R37, R38, R39, R40, R42, R43, and R44 are hydrogen, R36 and R41 are hydroxyl, and the compound is 7-methylene-7H-dibenzo[c,h]xanthene-3,1 1-diol, a salt, a hydrate, a salt hydrate, a stereoisomer, a dehydrate, a tautomer, or a derivative thereof —, or
(ii) R19, R20, R21, R23, R24, R25, R26, R28, R29, and R30 are hydrogen, R22 and R27 are hydroxyl, R31 is an unsubstituted C1 alkyl, z is a double bond, R32 is hydrogen, and the compound is 3,11-dihydroxy-3′-methyl-5′H-spiro[dibenzo[c, h[xanthene-7,2′-furan[-5′-one, a salt, a hydrate, a salt hydrate, a stereoisomer, a dehydrate, a tautomer, or a derivative thereof—,