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How was cisplatin discovered?

Cisplatin was discovered serendipitously in the 1960s by American chemist Barnett Rosenberg and colleagues while studying the effects of electric fields on bacterial cell division. In their experiments they used platinum electrodes and observed that bacteria stopped dividing and instead grew into long filamentous cells. Rosenberg initially thought this effect was caused by the electric current, but further investigation revealed that it was due to a platinum-containing compound released from the electrodes. This compound was later identified as cisplatin.