Anti-oxidant compounds and compositions

An antioxidant compound having a formula selected from the group consisting of

• wherein
• X and Z are each CH,
• R4 and R5 are the same or equal and are aryl groups,
• R1 and R3 are sterically hindering alkyl groups,
• R2 is OH, and
• n=1-10,
• wherein n=1-10,
• wherein n=−10,
• wherein n=1-10, and