Paliperidone Palmitate. 3-(2-(4-(6-fluoro-3-(1,2-benzisoxazolyl))-1-piperidinyl)ethyl)-6,7,8,9-tetrahydro-9-hydroxy-2-methyl-4H-pyrido(1,2-a)pyrimidin-4-one . 9-Hydroxy-risperidone . 9-Hydroxyrisperidone . 9-OH-risperidone . Invega . Invega Sustenna . Paliperidone . R 76477 . R-76477 . 9 Hydroxy risperidone . 9 Hydroxyrisperidone . 9 OH risperidone . Palmitate, Paliperidone . R76477 . Sustenna, Invega . A benzisoxazole derivative and active metabolite of RISPERIDONE that functions as a DOPAMINE D2 RECEPTOR ANTAGONIST and SEROTONIN 5-HT2 RECEPTOR ANTAGONIST. It is an ANTIPSYCHOTIC AGENT used in the treatment of SCHIZOPHRENIA. . 1.00