2928 Organic derivatives of hydrazine or of hydroxylamine

2928 (01/1988-..) Organic derivatives of hydrazine or of hydroxylamine 29280000 (01/1988-12/1996) Organic derivatives of hydrazine or of hydroxylamine 29280010 (01/1997-..) N, N-Bis`2-methoxyethyl`hydroxylamine 29280090 (01/1997-..) Organic derivatives of hydrazine or of hydroxylamine (excl. N, N-bis`2-methoxyethyl`hydroxylamine)