Catwoman (Selina Kyle) proposes that she, Poison Ivy (Pamela Lillian Isley) and Harley Quinn (Harleen Quinzel) work together, but before the other two women agree there's one thing they want from Selina: Batman's secret identity. To force the reluctant Catwoman into divulging the information, Poison Ivy gasses her with 'a mild texture'.
Source: Digital copy of comic