The synthesis and structure of the title compound, C21H17FN4O3S, is describ
ed. It is a novel spiro-indole in which the sp(3) spiro-C atom is linked to
S and N atoms. The pyrazole ring is aligned at 76.8(1)degrees with respect
to the attached phenyl ring and at 87.7(1)degrees with respect to the best
plane through the spiro ring. Molecules are linked to form infinite chains
by N-H ... O hydrogen bonds, with N ... O = 2.7002(15) Angstrom.