cl-struct-slot-info is a compiled Lisp function in `cl-macs.el'.

(cl-struct-slot-info STRUCT-TYPE)

Return a list of slot names of struct STRUCT-TYPE.
Each entry is a list (SLOT-NAME . OPTS), where SLOT-NAME is a
slot name symbol and OPTS is a list of slot options given to
`cl-defstruct'. Dummy slots that represent the struct name and
slots skipped by :initial-offset may appear in the list.