Rained acetaminophen's acquisition?

I can’t determine what you mean by “Rained acetaminophen’s acquisition” from the information provided. Could you clarify which company or event you’re referring to (for example, the acquisition of a company that makes acetaminophen, or an acquisition involving “Rained”)?

To help me answer precisely, please share one of the following:
- The full name of the company you mean by “Rained”
- The acquirer (who bought whom)
- The year (or approximate date)
- A link or headline you saw about the acquisition