Vindoline is an indole alkaloid that exhibits antimitotic activity by inhibiting microtubule assembly.

Prifinium bromide is a quaternary ammon antimuscarinic. It inhibits hyperkinesia of the digestive organs and urinary tract and has a spasmolytic action.

Spectinomycin sulfate hydrate is a broad-spectrum antibiotic and inhibits the growth of a variety of gram-positive and gram-negative organisms. Spectinomycin sulfate hydrate acts by selectively targeting to the bacterial ribosome and interrupting protein synthesis. Spectinomycin sulfate hydrate is also a noncompetitive inhibitor of td intron RNA with an Ki value of 7.2 mM-.