A compound with molecular formula C4H11N exhibits a triplet…

A compound with molecular formula C4H11N exhibits a triplet at d 0.9 (3H), a doublet at d 1.1 (3H), a quintet at d 1.4 (2H), a singlet at d 1.7 (2H) and a sextet at d 2.8 (2H) in its 1H NMR spectrum. Its IR spectrum shows two medium absorption bands near 3400 cm-1. What is the IUPAC name of this compound?