Hydroquinone derivative

Novel hydroquinone derivatives of the formulae (I) and (II), ##STR1## wherein R.sup.1 is an alkyl group having 7 to 11 carbon atoms, ##STR2## wherein each of R.sup.2 to R.sup.5 is independently a hydrogen atom, a lower alkyl group or a lower alkoxy group provided that at least one of R.sup.2 to R.sup.5 is a lower alkyl group or a lower alkoxy group, and R.sup.6 is an alkyl group having a carbon chain of at least 2 carbon atoms. as compounds having antioxidant activity and tumor incidence inhibiting activity, and an antioxidant and a tumor incidence inhibitor containing, as an active ingredient, a hydroquinone derivative of the formula (III), ##STR3## wherein each of R.sup.7 to R.sup.10 is independently a hydrogen atom, a lower alkyl group or a lower alkoxy group, and R.sup.11 is an alkyl group having a carbon chain of at least 2 carton atoms, and/or a salt thereof.

Skip to:  ·  Claims  ·  References Cited  · Patent History  ·  Patent History

Claims

Referenced Cited
U.S. Patent Documents
2459540 October 1949 Rosenwald
4933504 June 12, 1990 Correale et al.
5059627 October 22, 1991 Goto et al.
5387718 February 7, 1995 Kohler et al.
Foreign Patent Documents
39484 November 1981 EPX
3207937 May 1983 DEX
0287482 February 1991 DEX
3196534 August 1988 JPX
1557237 December 1979 GBX
Other references
  • John et al., Chem. Ber., 73(1940), 995-1001, 1940.
Patent History
Patent number: RE36139
Type: Grant
Filed: Dec 13, 1995
Date of Patent: Mar 9, 1999
Assignee: Nippon Hypox Laboratories Incorporated
Inventors: Toshio Satoh (Tokushima), Hitoshi Matsumoto (Tokushima), Yasunori Niiro (Tokushima)
Primary Examiner: Laura L. Stockton
Law Firm: Nixon & Vanderhye
Application Number: 8/571,717