This is the 16682nd most frequent Russian word.
синтетический
Synthetic.
Here 'синтетическое' describes the type of material the coat is made from, emphasizing it is artificially produced rather than natural.
Это синтетическое пальто намного теплее, чем я ожидал.
This synthetic coat is much warmer than I expected.
In this sentence, 'синтетическую' refers to a consolidated theory that combines multiple concepts or ideas, often from different sources.
Мы изучали синтетическую теорию эволюции на уроке биологии.
We studied the synthetic theory of evolution in biology class.
'Синтетическая' characterizes the formula as being created through artificial processes rather than naturally occurring.