88005-MX77

88005-MX77 was the serial number for an experimental drug synthesized and used by the UNSC. It was a fibroid muscular protein complex that boosted muscle density and strength. It was used on the Spartan-III super-soldiers and was significantly safer than the drugs used on the Spartan-II super-soldiers.

Trivia
7 Reference: 8+8+0+0+5=21, 7X3=21