Active oxygen scavengers containing pterin derivatives
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Dec 19, 2000
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N/A
app pub date -
Mar 31, 1998
filing date -
Jul 31, 1996
priority date (Note) -
Expired
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Abstract
An active oxygen scavenger comprising as an active ingredient a pterin derivative of the formula (I): ##STR1## wherein R.sup.1 and R.sup.2 are independently a hydrogen atom, an alkyl group of 1 to 4 carbon atoms, or an acyl group of the formula R.sup.3 --CO--, R.sup.3 is an alkyl group of 1 to 4 carbon atoms, X is a formyl group or hydroxymethyl group, A is a group of the formula (Ia): ##STR2## and n is 0 or an integer of 1 or more, with the proviso that when X is a hydroxymethyl group, n is 0, or when n is an integer of 1 or more, each of R.sup.1 and R.sup.2 is a hydrogen atoms, and X is a formyl group, or a cyclic compound thereof, or a salt thereof is disclosed.
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