[{"from": "human", "value": "Provide a brief overview of this molecule. [C][Branch2][Ring1][#Branch1][C][Branch1][S][C][Branch1][=Branch2][C][Branch1][C][F][Branch1][C][F][F][Branch1][C][F][F][Branch1][C][F][F][Branch1][S][C][Branch1][=Branch2][C][Branch1][C][F][Branch1][C][F][F][Branch1][C][F][F][Branch1][C][F][F]"}, {"from": "gpt", "value": "The molecule is a fluorinated hydrocarbon and gaseous substance used as an imaging contrast agent in echocardiogram. After administration in microsphere form, perflexane increases ultrasound reflectivity of blood. This leads to an improvement of ultrasound signaling."}]