Synonyms : 2, 3-Didehydro-2, 4-Dideoxy-4-Guanidino-N-Acetyl-D-Neuraminic Acid, 2, 3-Didehydro-2, 4-Dideoxy-4-Guanidinyl-N-Acetylneuraminic Acid, 4-Guanidino-2, 4-Dideoxy-2, 3-Didehydro-N-Acetylneuraminic Acid, 4-Guanidino-2-Deoxy-2, 3-Didehydro-N-Acetylneuraminic Acid