US9822113: Tricyclic compounds and process for preparation thereof

The invention relates to novel tricyclic compounds of formula (I) and (II). More particularly, the invention relates to novel tricyclic compounds of formula (I) and (II) and process of preparation of these compounds from 4,5-di-methyl-o-phenylinediamine. Further, the invention relates to a process for preparation of tricyclic compound hunanamycin A.