8 and 10 are previously known He I emission-line stars.
1, 2, 3, 4 and 9 are thought to be enshrouded protostars.
Nomenclature from Moneti, A., Glass, I. S.,
and Moorwood, A. F. M. 1994, MNRAS, 268, 194
Spectra for WC9 Star and LBV Candidate
Reference: Figer, Donald F., McLean, Ian S., Morris, Mark, Two New
Wolf-Rayet Stars and a Luminous Blue Variable Star in the Quintuplet
(AFGL 2004) Near the Galactic Center, Astrophysical Journal Letters,
447, L29, 1995.