Suggested Reaction 1.14.11.-

Left

4,4-Dimethyl-5alpha-cholest-7-en-3beta-ol
+O2
+2-Ketoglutaric acid

Right

4beta-Hydroxymethyl-4alpha-methyl-5alpha-cholest-7-en-3beta-ol
+CO2
+Butanedionic acid
[BiSSCat | GREP ]