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How to filter out TCP retransmissions

I have the tcp and ip header of some captured traffic as follow:

1510103571.963031 MAC1> MAC2, ethertype IPv4 (0x0800), length 74: (tos 0x0, ttl 64, id 39321, offset 0, flags [DF], proto TCP (6), length 60)
    ip1.43020 > ip2.443: Flags [S], cksum 0x6d38 (incorrect -> 0x742d), seq 373163901, win 65535, options [mss 1460,sackOK,TS val 6528740 ecr 0,nop,wscale 6], length 0

How can I filter out tcp retransmissions packets?