A compound, a resin composition and a laminated substrate thereof are provided. The compound has a structure represented by Formula (I) wherein A1 is C24-48 alkylene group, C24-48 alkenylene group, C24-48 alkynylene group, C24-48 alicyclic alkylene group, C24-48 alicyclic alkenylene group, or C24-48 alicyclic alkynylene group. A2 is C2-12 alkylene group, C6-C25 arylene group with two reactive groups, C4-8 cycloalkylene group, C5-25 heteroarylene group, divalent C7-C25 alkylaryl group, divalent C7-25 acylaryl group, divalent C6-25 aryl ether group, or divalent C7-25 acyloxyaryl group; and, n≥1.