User:Chekhov MacGuffin/Unknown drug

The full context regarding Haibara's discussion of her parent's death and another drug different from the APTX/Silver Bullet her parents made

A hypothetical drug or chemical of some sort that predates Atsushi, Elena, and Shiho's work for the Black Organization.

Evidence for existence

Haibara's thoughts

"Kudo-kun? You would probably never even dream that you are already part of a project the Black Organization has been working on already for half a century."

—Haibara's thoughts on Shinichi's shrunken predicament

APTX 4869 is the only known intersection between Shinichi and the Black Organization, meaning that Shinichi's de-aging made him relevant to the Black Organization's project. That project is, according to Haibara, over 50 years old. Atsushi and Elena Miyano only joined the Black Organization some 30 years ago at most when Atsushi left his parents' house to take up research. That means there are at least 20 years unaccounted for prior to the Miyanos joining where the Black Organization had a project that APTX 4869 could be considered a piece of.

Haibara's recent quote Awaiting more precise translation and source quote.

-Check, does Haibara's quote imply that she didn't work on the other drug the Black Organization wanted? Japanese vs English on implications.