Declension table of ?dharmaratna

Neuter	Singular	Dual	Plural
Nominative	dharmaratnam	dharmaratne	dharmaratnāni
Vocative	dharmaratna	dharmaratne	dharmaratnāni
Accusative	dharmaratnam	dharmaratne	dharmaratnāni
Instrumental	dharmaratnena	dharmaratnābhyām	dharmaratnaiḥ
Dative	dharmaratnāya	dharmaratnābhyām	dharmaratnebhyaḥ
Ablative	dharmaratnāt	dharmaratnābhyām	dharmaratnebhyaḥ
Genitive	dharmaratnasya	dharmaratnayoḥ	dharmaratnānām
Locative	dharmaratne	dharmaratnayoḥ	dharmaratneṣu

Compound dharmaratna -

Adverb -dharmaratnam -dharmaratnāt