.DELTA.2-1,2,4-Triazoline-5-thione, 3-phenyl- 1H-1,2,4-Triazole-3-thiol, 5-phenyl- 3414-94-6 3H-1,2,4-Triazole-3-thione, 1,2-dihydro-5-phenyl- NSC11565