no smell ?

[atrollappears]

That's interesting. Would there be any relationship between the release rate of the ester, and the strength of the smell?

Release of the ester is normally due to the length of the carbon chain, and the breaking of the bond at the C17-beta hydroxyl group catalyzed by esterases..

Regarding aroma, Marty should be able to answer this, he was our resident bio-chemist....

I'm unsure if he posts anymore, which is a shame...!!

Short chain esters like Ethyl-butanoate and Methyl-butanoate are used in the food flavouring and perfume industries, for their fruity aromatic properties:

http://www.thegoodscentscompany.com/data/rw1004792.html

Ethyl-butanoate:

Testosterone Propionate, with a similar short ester chain:

Testosterone enanthate, with a longer ester chain:

I'm unsure if esters of a different molecular structure, like cypionate would produce an aroma?

Testosterone Cypionate with its cyclo-pentyl ring:

 

[Dinahlady]

I would have though cypionate would smell the most different to propionate and enanthate. 

But then the difference between propionate and enanthate is quite big too (the chain isn't just longer, it's a lot longer)

Smell depends on how a molecule interacts with receptors in your nose, so it depends on how those receptors are shaped and how that translates into smell. Need some biochemist expert in here. 

But from the original question, and as I think Realtalk said, the solvents would make much more of a difference to the "smell" if it was all mixed up than the different ester. 

[9762291220]

Benzyl alcohol has a smell as does benzyl benzoate which is itself an ester of benzyl alcohol and benzoic acid. Simple esterification reaction. Hydrolysis reverses the reaction in the body in the same way that hydrolysis of steroid esters splits ester from steroid making it active in the body. This isnt complex stuff, and is not biochemistry...it is simple organic chemistry. Anyway the smells of these compounds are not particularly strong unless they are heated significantly releasing large amounts of vapours.

[Dinahlady]

Hydrolysis reverses the reaction in the body in the same way that hydrolysis of steroid esters splits ester from steroid making it active in the body. This isnt complex stuff, and is not biochemistry...it is simple organic chemistry. 

What you are saying doesnt have anything to do with how olfactory receptors function, which is Biochemistry/physiology.

When you smell Benzyl alcohol vs Benzylbenzoate you are smelling the Benzene as well as the functional group.