GDC0084 (RG7666) is a PI3K inhibitor with potential antineoplastic activity. GDC0084 (RG7666) specifically inhibits PI3K in the PI3K/AKT kinase (or protein kinase B) signaling pathway, thereby inhibiting the activation of the PI3K signaling pathway. This may result in the inhibition of both cell growth and survival in susceptible tumor cell populations.