How to obtain SNP rs ids using CHR:POS_A1_A2 format?

Question

[Mahan]

I have a list of SNPs as below and I would like to obtain SNP rs ids:

1 1:734349_T_C
1 1:753405_C_A
1 1:754182_A_G
1 1:754192_A_G
1 1:754334_T_C

[Pierre Lindenbaum]

Converting from chromosome pos to rsID ; How can I convert position to SNP ID ; Obtaining The Snp Rs Number With The Chromosomal Position ; SNP rsid by location? ; etc....