| abstract |
New quinone derivatives of the formula <IMAGE> wherein R1 is methyl or methoxy, or two of R1 combine to represent -CH=CH-CH=CH-, R is amino which may be substituted or -OR4 wherein R4 is hydrogen, C1-4 alkyl or -CH2-CH=C(CH3-CH2)mH (wherein m is an integer of 1 to 10), and n is an integer of 1 to 10 when R is amino which may be substituted, or n is an integer of 2 to 10 when R is -OR4, and their hydroquinone forms, have useful physiological activities such as blood-pressure decreasing and antiallergic activities. |