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A Structural Proof for the Hypericin 1,6-Dioxo Tautomer

✍ Scribed by Thomas G. Dax; Heinz Falk; Evgeny I. Kapinus


Publisher
Springer Vienna
Year
1999
Tongue
English
Weight
137 KB
Volume
130
Category
Article
ISSN
0026-9247

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## Abstract The carbon signals of the 2‐acylamino‐4__H__‐1,3,4‐thiadiazino[5,6‐__b__]quinoxalines 1a,b, 2‐acylamino‐4__H__‐1,3,4‐thiadiazino[5,6‐__b__]quinoxaline 1,1‐dioxides 2a,b, and 2‐amino‐4__H__‐1,3,4‐thiadiazino[5,6‐__b__]quinoxaline 3 in deuteriodimethyl sulfoxide and in deuteriotrifluoroac