Overconsumption of seeds from "Ginkgo biloba" can deplete vitamin B. Bilobol, another alkyl resorcinol found in "Ginkgo biloba" fruits, is also a strong skin irritant. "Ginkgo biloba" does not appear to be effective. Chinese scientists published a draft genome of "Ginkgo biloba" in 2016. Their diet included seeds of cycads, Ginkgo or similar plants. Bilobalide is a main constituent of the terpenoids found in Ginkgo leaves. Gymnosperms, such as conifers, cycads, "Ginkgo", and gnetophytes are seed-producing plants with open seeds. Larger plants and trees were represented by gymnosperms, such as conifer and ginkgo trees. Early seed-bearing plants include the ginkgo and conifers. The dessert is traditionally sweetened with water chestnut syrup, and served with ginkgo nuts. "Ginkgo" trees produce ovulate, pollen-bearing structures. On both sides, pine, cypress, and ginkgo trees guard the way. The leaves also contain unique ginkgo biflavones, as well as alkylphenols and polyprenols. All but the ginkgo nut are from evergreens. The relationship of ginkgo to other plant groups remains uncertain.