The new hydroxyphenylazoformamide derivatives, 4-hydroxyphenyl-1-azoformamide, 4-hydroxyphenyl-1-ONN-azoformamide and 2-methylsu1fonyl-4-hydroxy-6-methylthiophenyl-l-azoformamide, which we named craniformin, as well as three known related compounds, 4-methoxyphenyl- 1-azoformamide, 4 methoxyphenyl-1-ONN-azoformamide and 2-methylsulfinyl-4-hydroxy-6-methylthiophenyl-l-azoformamide (phenolic tautomer of rubroflavin), and three known steroids, ergosta-4,6,8(14), 22-tetraene-3-one. ergosta-7, 22-diene-3-01 and ergosterol peroxide were isolated from Caluatia craniformis. Structure of the compounds was established by chemical and spectroscopic means, including X-ray analysis.