With Poṭṭhapāda 52.2

52.2

Yasmiṃ samaye khīraṃ hoti, neva tasmiṃ samaye dadhīti saṅkhaṃ gacchati, na navanītanti saṅkhaṃ gacchati, na sappīti saṅkhaṃ gacchati, na sappimaṇḍoti saṅkhaṃ gacchati;

While it’s milk, it’s not referred to as curds, butter, ghee, or cream of ghee.