s-drol chemical formula????

[ed5742]

I bought S-drol awhile back from Nutracoastal and they changed the chemical formula. It used to be 2a, 17a-dimethyl-5a-androsta-3-one, 17b-ol. And I just purchased another bottle and it is 2a, 17a-methyl-5a-3-one, 17b-ol.. what is the difference between the dimethyl and methyl ? Did I get Ripped OFF ? everything is the exact same bottle label and all.. just the chemical formula? any info would be appreciated.