Rasarnava 6.34

6.34

vajrārkacitrakakṣāraṃ tumbīkṣārastathārjunaḥ
sarjakṣāro yavakṣāraṣṭaṅkaṇaścāṣṭamo bhavet //

alkali of spurge, calotropis, and leadwort, alkali of bottle gourd, and arjuna, / soda ash, potassii carbonas, and borax as the eighth;