012: Two zombies (one walking, one grabber). 201: [BLUE CABINET x2]. 102: Shrieker (also lures various other zombies into the area). 210: Opens the main gate.
The same applies for the next room:
102: Shrieker (also lures various other zombies into the area). 120: Three zombies, including a Bloodshot. 012: Three zombies; one of them holds a nitrogen tank which freezes them if shot. This cell also has an adjacent room:
201: [GREEN HERB], [BLUE CABINET x2], and a chest containing [5000 SKILL POINTS] and a [FIRST AID SPRAY]. Not bad! 021: Opens the main gate. Final door : 201