... 2 Et, NaH, THF, −20 °C, 91% over two steps; (c) H 2 , PrO 2 , AcOEt, 76%; (d) Bu 4 NF, THF, rt, 97%; (e) Ba(OH ... [CrossRef], [CAS] Pseudocarpaine, a new alkaloid from Carica papaya. Govindachari, TR; Pai, BR; Narasimhan, NS. Journal of the Chemical Society (1954), (), 1847 ...