Possible way to turn Isopropylphenidate to Ethylphenidate?

[mdpv]

I was reading that you can turn IPPH to EPH with ethanol.
Is this possible?

 

[HerrHaber]

you have to hydrolize the ester to the acid and then react with another alcohol to obtain a different ester... transesterification reaction is best and can be done with enzymes (novozyme- CAL) but I dont know a protocol... the easiest way is to get the ritalinic acid