It's estradiol benzoate. It did elevate my systemic estradiol levels but not to such extreme; I just checked the previous pages of the thread when I was describing it and it was 40 pg/ml.
The substance I took to counter this was indole-3-carbinol and it worked; after a month my estrogen levels were 'too low to be measured' according to the test.
Naturally I didn't take it to transition haha, was just trying to regrow my hair. It was prescribed to me by a dermatologist (I live in Eastern Europe). And so far it seems estradiol benzoate did in fact have a powerful regrowth effect on my hairline, but I can live without it as it's probably not very healthy long term, even with indole-3-carbinol.