Hello @purvesh.yadav
This Q&A forum is dedicate to the Refinitiv API general usage question. For this kind of data content, instrument name question, I strongly suggest you contact Refinitiv content expert team via http://my.refinitiv.com/ web site.
This is the top result in search engines for this question. For those who just want some guidance to get going on their own: the format appears to be ~ ${RIC_ROOT}S{NEAR_MONTH_CODE}{NEAR_1DIGIT_YEAR}_B{FAR_MONTH_CODE}{FAR_1DIGIT_YEAR} eg VXSV1-BX1 for BBG UXV1UXX1 (i.e., VXV1 VXX1).
Cheers