Here are some details about these compounds:
• Stigmastan-3-ol, (3β,5β) (24-ethyl-coprostanol); CAS N: 4736-91-8;
• Stigmastan-3-ol, (3α,5β) (24-ethyl-epicoprostanol); CAS N: 5060-24-2;
• Cholan-24-oic acid, 3,6-dihydroxy-, (3α,5β,6α)- (Hydeoxycholic acid); CAS N:
83-49-8;
• Cholan-24-oic acid, 3,6,7-trihydroxy-, (3α,5β,6α,7α)- (Hyocholic acid); CAS N:
547-75-1;
I need these standards for GC/MS.
Thank you very much.