Does this chord actually exist inthe real world

Hello all

This chord is in a published guitar chord book.

The chord is C7 flattened ninth augmented 11th. Are the publishers trying to be clever, or am I not clever enough?

It seems rather convoluted to me.

Best regards

if you took B-E-D-G#-A#-E# (that is, E7/b9/#11; second inversion), instead of C, you could have a chord progression like that of Bowie's Outside album opening (instrumental) track ("Leon take us outside") that is: B-E-D-G#-A#-E# - - - E - - - B-E-D-G#-A#-E# - - - E - - - , etc.

greetings

Thank you Athair, kind of you.

Best