As you have asked about the IFSC code details of the Union Bank of India LD Ruparel Marg, Mumbai branch, I am giving you information about it, check below for the details
Bank: UNION BANK OF INDIA

Address:
19, L.D. RUPAREL MARG,MUMBAI - 400 006.

State: MAHARASHTRA
District: GREATER BOMBAY
Branch: L. D. RUPAREL MARG - MUMBAI

IFSC Code:
UBIN0534544 (used for RTGS, IMPS and NEFT transactions)

Branch Code:
Last six characters of IFSC Code represent Branch code.

MICR Code: 400026048

Use the rbach locator tool to get the information about it as an alternative.
To use it
Go to Union Bank of India website
Click on Show
Click on Find ATM/ branch, the page open seems like



Here enter the required details and you will get the information.