Zaleplon Related Compound C (25 mg) (7-[3-(N-ethylacetamido)phenyl]pyrazolo[1,5-a]pyrimidine-3-carboxamide)

Zanamivir (200 mg)

Zanamivir Related Compounds Mixture (2.5 mg)

Zanamivir Resolution Mixture (0.25 mg) (Mixture of zanamivir and talo-zanamivir)

Zidovudine (400 mg)

Zidovudine Related Compound B (25 mg) (3'-chloro-3'-deoxythymidine)

Zidovudine Related Compound C (100 mg) (thymine)

Zidovudine Related Compound D (50 mg) ([1-(2-Deoxy-beta-D-ribofuranosyl)]thymine)

Zileuton (150 mg)

Zileuton Related Compound A (50 mg) (N-(1-Benzo[b]thien-2-ylethyl) urea)