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4-Phenylfentanyl is a sythetic opioid derived from fentanyl. 4-Phenylfentanyl is around 8x the potency of fentanyl in analgesic tests on animals, but more complex 4-heteroaryl derivatives such as substituted thiophenes and thiazoles are more potent still, as …

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Deskripsi belum tersedia.

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