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Me too!
And no, it can't be synthesized easily (and I'm not that bad in organic chemistry) and certainly not at home ;( .
An alternative would also be nice... maybe test apples as last resort?
All I found out was that approved farmers can get it (e.g. Florel) litre-wise. Find one and ask if you could get some millilitres. Where I live, no one uses it (or at least nobody admits using it).
Here's a little breeding trick. Everyone knows STS or colloidal silver for feminizing seeds. Guess what works for masculinizing seeds?