With nitrous acid aspergillomarasmine A is deaminated, and isoserine with aspartic acid is formed.
2.
Nitric acid oxidation of ( + )-isoserine ( "'3 "') gives ( )-glyceric acid, establishing that ( + )-isoserine also has the same absolute configuration . ( + )-Isoserine can be converted by a two-stage process of bromination and zinc reduction to give ( )-lactic acid, therefore ( )-lactic acid also has the same absolute configuration.
3.
Nitric acid oxidation of ( + )-isoserine ( "'3 "') gives ( )-glyceric acid, establishing that ( + )-isoserine also has the same absolute configuration . ( + )-Isoserine can be converted by a two-stage process of bromination and zinc reduction to give ( )-lactic acid, therefore ( )-lactic acid also has the same absolute configuration.
4.
Nitric acid oxidation of ( + )-isoserine ( "'3 "') gives ( )-glyceric acid, establishing that ( + )-isoserine also has the same absolute configuration . ( + )-Isoserine can be converted by a two-stage process of bromination and zinc reduction to give ( )-lactic acid, therefore ( )-lactic acid also has the same absolute configuration.
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