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White, spherical, flat, scored tablet marked with “ RU twenty” on one side, somewhere around 9 mm in diameter. The rating line is barely to facilitate breaking for ease of swallowing and never to divide into equal doses.整體而言，派醋甲酯與同為中樞神經興奮劑的安非他命結構上相似，但派醋甲酯和安非他命不同