Question

The deep brown carbon compound used in tanning of leather

Answer 1

$\star \bf\large\underline\blue{Aɳʂɯҽɾ}$

Tannins

Tannins are the deep brown carbon compound used in the process of tanning leather.

Answer 2

Tannins

Tannins are the deep brown carbon compound used in the process of tanning leather.