l carnitine fumarate wikipedia | C7H15NO3 | CID 10917 containing 58.5% carnitine L-Carnitine 541-15-1 wiki
Description
Also much more affordable then other places

Skin Pharmacology and Physiology, 20, 195-198
Injection Site Selection: Common injection sites for L-carnitine include the deltoid muscle (upper arm), vastus lateralis muscle (thigh), or gluteal muscle (buttocks)

R., Sanchez-Lopez, E., dos Santos, T., Garcia, M