Des-A-triterpenoids, diagenetic products of pentacyclic triterpenoids from A-ring
degradation, have great potential for tracking specific biological sources in the environment …

Abstract des-A-triterpenoids have been widely recognized as indicators of terrestrial
vascular angiosperms and microbial activities. However, recent studies also suggested …

Aliphatic des-A-triterpenoids have been tentatively assigned in samples taken from a 260cm
thick peat sequence from the Dajiuhu Basin of southern China using gas chromatography …

Aliphatic des-A-triterpenes, the degradation products of pentacyclic triterpenes have been
tentatively assigned in samples taken from a 963-cm-thick peat sequence from the Hani …

Aliphatic and aromatic degraded triterpenoids (TTs), including des-A and des-E TTs, were
investigated in turbiditic and hemipelagic mudstones from the Miocene Kawabata Formation …

Aromatic derivatives of vascular plant triterpenoids are common in recent and ancient
sediments, coal, and petroleum. Understanding their early diagenetic alterations and their …

Triterpenoids and their derivatives are ubiquitous in sediment samples. Land plants are
major sources of nonhopanoid triterpenoids; these terpenoids comprise a vast number of …

Non-hopanoid pentacyclic triterpenoids occur widely in lake sediments, but their biological
sources and diagenetic pathways are not fully resolved. We tentatively identified a number …

A series of Δ 2-triterpenoids (oleana-2, 12-diene, oleana-2, 13 (18)-diene, oleana-2, 18-
diene, ursa-2, 12-diene, and taraxera-2, 14-diene) has been identified in Holocene buried …

We studied the high-resolution and well-dated 25,000 year sedimentary record of Lake
Challa, a deep tropical crater lake in equatorial East Africa, to explore new proxies for …