Bulbophyllum odoratissimum is a species of orchid in the genus Bulbophyllum. Bulbophyllum odoratissimum (Smith) Lindley is rhizome creeping or straggling, 2-4 mm in diam., branched, covered with membranous tubular sheaths, rooting from base of pseudobulbs, roots spreading. Pseudobulbs 4-8 cm apart from each other, subcylindric, 2.5-5 cm, 3-6(-9) mm in diam., with a terminal leaf. Leaf subsessile; blade oblong, 4-13.5 * 0.8-2.6 cm, leathery, apex obtuse and slightly emarginate.

Bulbophyllinoside (1), a new phenolic glycoside and three known compounds were isolated from the whole plant of Bulbophyllum odoratissimum Lindl. Their structures were determined as 3-hydroxyphenethyl alcohol 4-O-( 6'-O-beta-apiofuranosyl) -beta-D-glucopyranoside (1), 3-methoxyphenethyl alcohol 4-O-beta-D-glucopynanoside (2), 3, 5-dimethoxyphenethyl alcohol 4-O-alpha-D-glucopynanoside (3) and syringin (4).