SEARCH Articles Figures Tables 2-pyrazoline 3- Amino-2-pyrazolin-5-ones, 136, 3- Amino-3-pyrazoline, reaction with 4- Amino-2-pyrazolin-5-ones synthesis 4-Amino-3-pyrazolin-5-ones acylation 4-Amino-3-pyrazolin-5-ones alkylation 4-Amino-3-pyrazolin-5-ones reaction with aldehydes Arenesulfonyl chlorides, reaction with 3-amino-3-pyrazoline Pyrazolinate Pyrazolines