# In Vitro Effect of Ferruginol, Tanshinone, and Carnosol Analogues on the Proliferation of Three Breast Cancer Cell Lines

## TL;DR

This study tests natural compound analogues for their ability to inhibit breast cancer cell growth, finding that compounds 10 and 11 are particularly effective against triple negative breast cancer.

## Contribution

The paper introduces new analogues of ferruginol, tanshinone IIA, and carnosol with demonstrated efficacy against breast cancer cells.

## Key findings

- Compounds 10 and 11 showed significant efficacy against triple negative breast cancer cells.
- Most analogues exhibited biological activity, but compounds 10 and 11 stood out in their effectiveness.
- The analogues were synthesized efficiently and tested using multiple biological assays.

## Abstract

Ferruginol, tanshinones and carnosol are considered privileged natural products due to their demonstrated diverse biological activities with relevance to cancer research. Globally, cancer continues to be a major contributor to mortality rates, making these compounds potentially valuable molecular scaffolds for further development as potential anticancer agents. In this work, a focused library of ferruginol, tanshinone IIA, and carnosol analogues was studied to examine their effectiveness against various solid tumor models. The compounds were efficiently synthesized from either methyl 12-hydroxy-dehydroabietate or 12-hydroxydehydroabietylamine in 1–3 step processes with good chemical yields. The compounds that were synthesized underwent a methodical evaluation using multiple biological tests (including viability assays, clonogenic assays, and mitochondrial membrane polarization measurements) to determine their ability to inhibit in vitro the growth of three breast cancer cell linages. It was determined that while most compounds exhibited biological activity, compounds 10 and 11 demonstrated significant efficacy against triple negative breast cancer cells. These compounds continue to show promising biological activity, suggesting that additional studies to understand their mechanisms of action would be valuable.