1,4-Dihydro-2,6-dimethyl-4-(2-nitrophenyl)-3,5-pyridinedicarboxylic acid dimethyl ester 21829-25-4 AIDS-087985 AIDS087985 Adalat CC Citilat Cordipin Corinfar Fenihidin Fenihidine Nifedipine Oxcord Procardia XL