Are these chemical structures the same?

Question

2a,17a-dimethyl-17b-hydroxy - 5a - androstan- 3-one

and

2a, 17a dl methyl etiocholan 3-one, 17b-ol

They look the same but I wanted to make sure as my OChem is a bit rusty right now.

Answer 1

I don't know how the parent structure "etiocholan" looks like, but the side chains are obviously the same with the same attachment. But since you ended the 2nd structure with 17b-ol, that means that your parent compound is the an alcohol and not a ketone, contrary to your first structure which ends with 3-one. Also, another point of difference is that the 17b-hydroxy in your first structure serves as a side chain, unlike the 17b-ol in the 2nd structure which is considered as part of the parent compound because you put it last in the chemical name, and there is a big difference between the function of a side chain and that of a parent compound because a parent compound is supposed to be more stable. So, NO they are not the same! ;)

Answer 2

Every cell has DNA and it is consisted of two strands tightly woven around each other. The thing that prevents the two strands from breaking apart is called a telomeric cap (which is random nucleotide sequences called nonsense codons. Codon is a 3 sequence of nucleotides that codes for amino acids eg. CUU is a amino acid called proline . A nonsense codon is one that doesnt code for any amino acid production) Every time your cells divide a small sequence is lost there by reducing the stability of the cell's DNA (in layman's terms). This will eventually lead do most of Ur cells' DNA becoming unstable. And usually when a mistake occurs in DNA the cell will perform auto cytolysis (cell suicide) to prevent problems. So when you are old most of ur cells telomeric caps will be low and they are prone to die when they try to divide.. Whats really interesting about this theory is the impact it has on evolution (because this happens on both meiotic as well as mitotic divisions. which means that a species grows old too before it mutates.. but thats a different story)

Answer 3

They are the same, use the tool of ChemDraw NAME TO STRUCTURE and there you can write: androstane and later ethiocholane, so you will find the same steroidal and same stereochemistry, later just put the substituents.