Centennial hop extract. Can be used for bittering but also has a very intense aroma. Packed in syringes that are FDA approved for light-sensitive medications.
While there are many online formulas and calculators as to the usage of hop extract, most will have a caveat that they are only rough approximations, or are hypothetical calculations and do not reflect total accuracy. Furthermore, they are dependent on equipment, process, and recipe and should be confirmed by laboratory analysis. Brewing with these extracts on the homebrew level should be considered experimental.