Task: Class Definition Understanding (ontology: Sciences/Biology)

Which of the following definitions best describes 'solanine'?

A. A glycoalkaloid poison found in species of the nightshade family (Solanaceae), such as the potato (Solanum tuberosum). It is a trisccharide derivative of solanidine [(22beta)-solanid-5-en-3beta-ol].
B. A triterpenoid saponin that is (3beta,16alphaalpha)-13,28-epoxyoleanane-3,16,30-triol with a beta-D-Glcp-(1->2)-[beta-D-Glcp-(1->4)]-alpha-L-Arap moiety attached to position 3 by a glycosidic linkage. It is isolated from Ardisia japonica and exhibits anticancer properties.
C. A steroid saponin that consists of (25R)-5alpha-spirostan-3beta-ol substituted by an oxo group at position 12 and a beta-D-galactopyranosyl moiety at position 3 via a glycosidic linkage.
D. A triterpenoid saponin that consists of urs-11-ene substituted by an epoxy group across positions 13 and 28, a hydroxy group at position 16 and a alpha-L-rhamnopyranosyl-(1->2)-beta-D-glucopyranosyl-(1->2)-beta-D-fucopyranosyloxy residue at position 3 (the 3beta,16alpha stereoisomer). Isolated from the fruits of Bupleurum rotundifolium, it exhibits antiproliferative activity against cancer cells.

Answer: A glycoalkaloid poison found in species of the nightshade family (Solanaceae), such as the potato (Solanum tuberosum). It is a trisccharide derivative of solanidine [(22beta)-solanid-5-en-3beta-ol].