List of top Pharmaceutical Chemistry Questions on Medicinal Chemistry

Methotrexate, used as an antimetabolite, is a product of N-methylation of para-aminobenzoic acid and pyridine hydroxyl. The isosteric group is
A/B Trans steroidal hydrogen in the 5th position
Total Number of Carbon atoms in pregnane is
Steroidal cholestane ring fused with
Hypnotics and sedative barbiturate pK$_a$ value
Structure of hybrid in methadone and meperidine