India, June 21 -- Mark Dygdon and Rodrigo Castro are facing federal charges after prosecutors accused them of conspiring to import and distribute large quantities of gamma-butyrolactone (GBL), a chemical that authorities describe as a dangerous "date rape drug," in New York City.

The two Manhattan men pleaded not guilty to the charges.

Here's what to know about the case.

According to the New York Post, federal prosecutors allege that Dygdon, 48, and Castro, 34, conspired to import approximately seven tons of gamma-butyrolactone (GBL) into New York City between August 2023 and June 2026.

Authorities claim the quantity seized equates to roughly one million individual doses.

GBL is commonly sold under street names including Blue Nitro a...