Bis-spiro-azaphilones and azaphilones from the fungi Chaetomium cochliodes VTh01 and C. cochliodes CTh05 - Phonkerd, N; Kanokmedhakul, S; Kanokmedhakul, K; Soytong, K; Prabpai, S; Kongsearee, P (Tetrahedron, 2008)