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Stereochemistry Prohibition Sign ee.svg Stereochemisches Verbotsschild ee Enantiomerenberschuss im Anlehnung an DIN Stereochemical prohibition sign ee Enantiomeric excess following DIN Own DPRauchenverboten svg by basierend auf DPRauchenverboten svg von Torsten Henning Sponk talk SVG signs Prohibition signs Red circle with left