Patent ID: 6326369
Filing Date: 2001-12-04
Classification: C07C,C07D

Abstract:
A compound of the formula: ##STR97##wherein R.sup.1 and R.sup.2 each represents a lower alkyl, or wherein R.sup.1 and R.sup.2 may be bonded together to form a ring;X represents a spacer of which the number of atoms constituting the principle chain is 1 to 15;Y represents an acyl, a hydroxy which may be substituted, an amino which may be substituted or an aromatic group which may be substituted; andring A represents a 5- to 8-membered ring which may be further substituted apart from the group of the formula --X--Y wherein each symbol is as defined above,or a salt thereof, wherein the compound is not 4-acetoxy-6,7-dimethoxy-2,2-dimethylchroman-5,8-quinone, and is not ##STR98##