2,3,4,9-Tetrahydro-N-phenylthiopyrano(2,3-b)indole-4-methanamine ethanedioate (1:1) 73425-67-9 Thiopyrano(2,3-b)indole-4-methanamine, 2,3,4,9-tetrahydro-N-phenyl-, ethanedioate (1:1)