Brand: Vanceril

Structure features:

-9chloro

-17' ethyl attached to ether

-16' Beta methyl

Brand: Pulmicort

Structure features:

-16' and 17' make acetal group

Brand: Aerobid

Structure features:

-6 fluoro group

-16 and 17 form acetonide(acetone and ketal group)

Brand: Flovent, Flonase

Structure features:

-6 and 9 fluoro group

-16 methyl

-C-20 thiofluoromethyl (presence of sulfur)

Brand: Asmanex

Structure features:

-9 chloro

-16 methyl

-17 furan on ester

Brand: Azmacort

Structure features:

-9 fluoro

-16 and 17 for acetonide (acetone and ketal)

*The acetonide remaines intact during metabolism because it is highly resistant to hydrolytic cleavage.