(1100−1400)cm−1(1100-1400) \mathrm{cm}^{-1}(1100−1400)cm−1
(3300−3600)cm−1(3300-3600) \mathrm{cm}^{-1}(3300−3600)cm−1
(2800−3000)cm−1(2800-3000) \mathrm{cm}^{-1}(2800−3000)cm−1
(1660−1860)cm−1(1660-1860) \mathrm{cm}^{-1}(1660−1860)cm−1
