We have searched for non-SM-like CP-odd Higgs-boson ([special characters omitted]) with [special characters omitted] < 2m_b in radiative decays of the ϒ(1 S), using 21.5M ϒ(1S) mesons directly produced in e⁺e^- annihilation. We investigate [special characters omitted] → τ⁺τ^- and [special characters omitted] → μ⁺μ^- decay channels. No significant signal is found. We obtain upper limits on the product of [special characters omitted](ϒ(1S) → γ[special characters omitted]) and [special characters omitted]([special characters omitted] → τ⁺τ^-) or [special characters omitted]([special characters omitted] → μ⁺μ^-). Our τ ⁺τ^- results are almost two orders of magnitude more stringent than previous upper limits. Our data provides no evidence for a Higgs state decaying to μ⁺μ^-, with a mass of 214 MeV. Existence of such state was previously proposed as an explanation for 3 Σ⁺ → pμ⁺μ ^- events, with μ⁺μ^- mass just above the kinematic threshold, claimed by the HyperCP experiment. Our results constrain NMSSM mode.